Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology最新文献_第2页

The effects of interaural time and level differences on the binaural interaction component of the auditory brainstem response in Cope's gray treefrogs. 耳间时间和水平差异对柯普灰树蛙听觉脑干反应双耳相互作用成分的影响。

IF 2.3 4区心理学

Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology Pub Date : 2026-09-01 Epub Date: 2026-05-03 DOI: 10.1007/s00359-026-01811-7

Jain Pushpalatha Krishnan, Amita Chawla, Elizabeth A McCullagh, Michael S Reichert

{"title":"The effects of interaural time and level differences on the binaural interaction component of the auditory brainstem response in Cope's gray treefrogs.","authors":"Jain Pushpalatha Krishnan, Amita Chawla, Elizabeth A McCullagh, Michael S Reichert","doi":"10.1007/s00359-026-01811-7","DOIUrl":"10.1007/s00359-026-01811-7","url":null,"abstract":"Processing binaural cues is crucial for many acoustic communication tasks, and understanding the neural mechanisms of binaural sound processing gives important insights into how receivers localize signalers, which in anurans is a key component of mate selection. We characterized the binaural interaction component (BIC) of the auditory brainstem response (ABR) by collecting monaural and binaural ABRs using click stimuli with varying interaural time difference (ITD) and interaural level difference (ILD) in male and female Cope's gray treefrogs (Hyla chrysoscelis). We hypothesized that the latency of the BIC peaks would increase with larger ITDs and ILDs. We also hypothesized that females would show a stronger relationship between binaural cues and BIC characteristics than males because of the greater importance of directional hearing for females. We characterized two prominent BIC peaks, DN1 and DN2. Both BIC peak latencies had a positive relationship with ITD, but there was no effect of ITD on peak amplitudes. The amplitude and latency of the BIC peaks were not affected by variation in ILD. There were no sex or body size effects on ABR or BIC characteristics. Our findings demonstrate that the BIC is driven primarily by ITD in H. chrysoscelis. This is the first study to characterize the BIC in an amphibian, which expands the comparative understanding of the neural mechanisms of binaural hearing in vertebrates.","PeriodicalId":54862,"journal":{"name":"Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology","volume":" ","pages":"869-885"},"PeriodicalIF":2.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147823533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Crepuscular vocal partitioning and thermal limits on calling behavior in the Bubbling Kassina (Kassina senegalensis) in a sub-equatorial savanna. 亚赤道热带稀树草原冒泡卡西纳（Kassina senegalensis）黄昏声区及鸣叫行为的热限制。

IF 2.3 4区心理学

Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology Pub Date : 2026-09-01 Epub Date: 2026-06-30 DOI: 10.1007/s00359-026-01825-1

Gustavo Arias Álvarez, Rafael Márquez, Nicolas Mathevon, Kirsty Kyle, Philip R Jordaan, Paulo Fonseca

{"title":"Crepuscular vocal partitioning and thermal limits on calling behavior in the Bubbling Kassina (Kassina senegalensis) in a sub-equatorial savanna.","authors":"Gustavo Arias Álvarez, Rafael Márquez, Nicolas Mathevon, Kirsty Kyle, Philip R Jordaan, Paulo Fonseca","doi":"10.1007/s00359-026-01825-1","DOIUrl":"10.1007/s00359-026-01825-1","url":null,"abstract":"Acoustic communication in anurans is energetically costly and constrained by environmental factors, especially in open savanna ecosystems where extreme temperature fluctuations, desiccation risks, and wind-induced noise pose significant challenges to signal propagation and caller physiology. We analyzed the acoustic ecology of the widespread bubbling Kassina (Kassina senegalensis) in Mozambique, and compared it with that of other locations. We examined the influence of temperature, photoperiod and moonlight on calling phenology. Calling phenology was strongly seasonal driven, while daily patterns showed a bimodal strategy with peaks at dawn and dusk. This crepuscular activity suggests a behavioral adaptation to optimize signal transmission during stable atmospheric conditions and/or reducing desiccation. We identified a thermal window for vocalization (~ 23-27 °C), with activity sharply declining above 30 °C, suggesting a physiological upper limit. Moonlight also had an effect on calling activity. These findings highlight the behavioral and physiological plasticity of K. senegalensis in navigating savanna constraints, offering insights into ectotherm neuroethological adaptations amid climate change.","PeriodicalId":54862,"journal":{"name":"Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology","volume":" ","pages":"781-791"},"PeriodicalIF":2.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148354696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Beamforming as a mechanism for azimuthal localization of targets by FM-echolocating big brown bats. 波束形成作为大棕蝠fm回波定位目标方位的一种机制。

IF 2.3 4区心理学

Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology Pub Date : 2026-09-01 Epub Date: 2026-08-07 DOI: 10.1007/s00359-026-01834-0

James A Simmons, Andrea Megela Simmons

{"title":"Beamforming as a mechanism for azimuthal localization of targets by FM-echolocating big brown bats.","authors":"James A Simmons, Andrea Megela Simmons","doi":"10.1007/s00359-026-01834-0","DOIUrl":"10.1007/s00359-026-01834-0","url":null,"abstract":"Echolocating big brown bats broadcast downward-sweeping, frequency-modulated (FM) biosonar sounds and process the returning echoes to track and capture flying insects. Neurons in the inferior colliculus are tuned to different frequencies along the FM sweep and form a representation of target azimuth largely on the basis of sensitivity to interaural differences in intensity, with canonical interaural time difference cues by themselves less reliable. Here, we reanalyze neurophysiological data on binaural sensitivity of inferior colliculus neurons consistent with a signal-processing model used in engineered sonar for generating directional beams. Model inputs are the times-of-occurrence of phasic-on responses to FM sweeps presented at a range of interaural intensities and azimuths. Tuning curves for interaural intensity were computed, and the slopes of these tuning curves plotted against neuronal best frequency and sound azimuth. The resulting aggregate plots suggest that the bat forms two distinct beams, one encompassing the entire FM sweep for a narrow zone of azimuths straight ahead and the other restricted to lower frequencies and offside to the left and the right. When interpreted with respect to psychophysical data, these analyses suggest that the forward beam allows for acute target perception, while the offside beams allow for perception of multiple objects that constitute clutter. The distribution of azimuths further suggests the formation of numerous detailed offside beams pointing in different directions to accommodate the width of the spatial arrangement of the clutter.","PeriodicalId":54862,"journal":{"name":"Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology","volume":" ","pages":"901-911"},"PeriodicalIF":2.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13642496/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148690501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Courtship at reaching-range in the túngara frog. túngara青蛙的求偶范围。

IF 2.3 4区心理学

Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology Pub Date : 2026-09-01 Epub Date: 2026-08-10 DOI: 10.1007/s00359-026-01830-4

Olivia R Chung, Marcos Gridi-Papp

{"title":"Courtship at reaching-range in the túngara frog.","authors":"Olivia R Chung, Marcos Gridi-Papp","doi":"10.1007/s00359-026-01830-4","DOIUrl":"10.1007/s00359-026-01830-4","url":null,"abstract":"Courtship in frogs can mediate the final approach between the sexes before amplexus and spawning. It can involve male and female calling, touching, and guidance to the spawning site. Courtship behaviors have been described for several species in nature but little experimentation has been done to uncover the biological mechanisms that control them. We characterized the close-range courtship (within 10 cm) interactions in the túngara frog, an emerging model organism, to provide a quantitative baseline in a neutral arena in support of future experiments. In this initial assessment, we isolated each pair to examine only the social stimulation that is intrinsic to the pair. Among 81 pairs, 80% entered amplexus and of those 57% laid eggs. Males called before amplexus in 86% of the trials in spite of the female's proximity. The female was inferred to execute the final approach before amplexus in 79% of the events. Egg laying was concentrated in the period 6-8 h after sunset and it could be followed by calling. Multiple bouts of egg nest building were observed in 1/4 of the trials and physical contact other than amplexus was common. Male strategy, the last approach before amplexus, and egg laying were not influenced by age or body size but females with high body condition were more likely to lay eggs. Our data revealed that courtship in the túngara frog is not necessarily terminated when the male is approached by the female, but additional close-range interactions may mediate the onset of amplexus and reproductive success.","PeriodicalId":54862,"journal":{"name":"Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology","volume":" ","pages":"765-779"},"PeriodicalIF":2.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13642479/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148708490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Looking ahead: echolocation and flight behaviors of two fruit bat species navigating a corridor. 展望未来：两种果蝠在走廊上导航的回声定位和飞行行为。

IF 2.3 4区心理学

Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology Pub Date : 2026-09-01 Epub Date: 2026-07-24 DOI: 10.1007/s00359-026-01818-0

Keegan E Eveland, Nikita M Finger, Jared M Jaroszewski, Leslie Bucio, Cynthia F Moss

{"title":"Looking ahead: echolocation and flight behaviors of two fruit bat species navigating a corridor.","authors":"Keegan E Eveland, Nikita M Finger, Jared M Jaroszewski, Leslie Bucio, Cynthia F Moss","doi":"10.1007/s00359-026-01818-0","DOIUrl":"10.1007/s00359-026-01818-0","url":null,"abstract":"Bats navigating clutter must steer around obstacles to avoid collision, while simultaneously planning future flight trajectories. In this study, we investigated active sensing strategies of two bat species negotiating turns under matched geometric constraints. We compare the Egyptian fruit bat (Rousettus aegyptiacus), a lingual echolocator that can actively direct its sonar beam axis using tongue driven mechanisms, and the short-tailed fruit bat (Carollia perspicillata), a laryngeal nasal echolocator whose head aim and nose leaf shape emission directionality. Bats flew through a felt lined, 'L' shaped corridor designed to elicit turns. A 32-channel ultrasonic array and 3D video tracking system captured their sonar emissions and flight trajectories. In both species, bats reduced flight speeds and increased angular deviation between sonar beam aim (acoustic gaze) and flight direction before the apex of high angle turns. A directional prediction analysis showed that sonar gaze reliably anticipated the direction of the subsequent heading change in both species (77% in R. aegyptiacus; 70% in C. perspicillata). However, baseline flight and echolocation behavior differed between species: C. perspicillata flew faster and, produced higher sonar pulse rates than R. aegyptiacus, consistent with species differences in body size, wing morphology, and sensory ecology. Together, these data demonstrate that fruit bats prospectively orient acoustic gaze to guide upcoming trajectory changes, extending \"steering by hearing\" beyond prey tracking by insectivorous bats to navigation of cluttered space by frugivorous bats.","PeriodicalId":54862,"journal":{"name":"Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology","volume":" ","pages":"995-1008"},"PeriodicalIF":2.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13642441/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148581324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Timescales of call variability in a South American treefrog. 南美树蛙叫声变化的时间尺度。

IF 2.3 4区心理学

Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology Pub Date : 2026-09-01 Epub Date: 2026-07-30 DOI: 10.1007/s00359-026-01829-x

Mariana Rodriguez-Santiago, Paula Pouso, Kim Hoke, Erik Zornik

{"title":"Timescales of call variability in a South American treefrog.","authors":"Mariana Rodriguez-Santiago, Paula Pouso, Kim Hoke, Erik Zornik","doi":"10.1007/s00359-026-01829-x","DOIUrl":"10.1007/s00359-026-01829-x","url":null,"abstract":"Communication systems shape behavioral interactions that are crucial for recognition, territoriality, and reproduction across animals. In many anuran species, acoustic communication drives reproductive and defensive behaviors as males produce advertisement calls to establish territories and attract females. Understanding the temporal dynamics in vocalizations and their variation between and within males can provide crucial insight into the mechanisms that generate call patterning and communication. Here, we examine such dynamics in the call patterning of male Boana pulchella, a South American treefrog species that produces temporally-variant call series over time. Using rhythm analysis, we quantify the rhythmic structure of these vocalizations and characterize the variability in their temporal patterning between males. We find that rhythmic isochrony is timescale-dependent - call series are produced isochronously while the patterning of calls and notes within these series is non-isochronous yet periodic. The isochronous rhythm is maintained through an inverse relationship between series duration and the silence interval that follows it, such that longer series are followed by shorter silence intervals. Temporal features of calls and notes as well as their variation vary depending on within-series patterning dynamics and across timescales. Taken together, these results suggest that B. pulchella vocal timing is generated by hierarchically organized oscillators that produce isochronous vocalizations over a calling bout through flexible modulation at finer timescales.","PeriodicalId":54862,"journal":{"name":"Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology","volume":" ","pages":"737-751"},"PeriodicalIF":2.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148622677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Developing broad brains: the importance of an early introduction to evolutionary thinking in undergraduate neuroscience programs. 发展广阔的大脑：在本科神经科学课程中早期介绍进化思维的重要性。

IF 2.3 4区心理学

Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology Pub Date : 2026-09-01 Epub Date: 2026-04-30 DOI: 10.1007/s00359-026-01809-1

Megan D Gall, Justin C Touchon

{"title":"Developing broad brains: the importance of an early introduction to evolutionary thinking in undergraduate neuroscience programs.","authors":"Megan D Gall, Justin C Touchon","doi":"10.1007/s00359-026-01809-1","DOIUrl":"10.1007/s00359-026-01809-1","url":null,"abstract":"There have been a number of calls for neuroscience to embrace a wider range of model systems. Authors of these opinion pieces have emphasized the inherent value of explicitly evolutionary and comparative work in neuroscience and the value of diversity in applied and biomedical research. However, few of these papers address the role of undergraduate neuroscience education in preparing students to pursue, much less value, evolutionary and comparative neuroscience. Here, we argue that the field of neuroscience would benefit from the explicit inclusion of evolutionary and comparative neuroscience in introductory courses. We first review the state of introductory neuroscience curricula and available teaching materials, before discussing the importance of an early introduction to evolutionary and comparative ideas, challenges to incorporating these ideas into introductory courses, and finally offer a number of strategies to increase student awareness of the diversity of systems available for neuroscience research. We speculate that introducing students to evolutionary and comparative neuroscience early in their education may increase retention of students with an evolutionary or comparative bent, which may increase the number of researchers interested in pursuing these questions in their careers, while also making students bound for health, biomedical research, or engineering professions more aware of the value of evolutionary and comparative approaches.","PeriodicalId":54862,"journal":{"name":"Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology","volume":" ","pages":"1025-1036"},"PeriodicalIF":2.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147789827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Confusion and human errors in locating synthetic frog calls: Insights into the evolution of a vocal communication signal. 定位合成青蛙叫声的困惑和人为错误：对声音交流信号进化的洞察。

IF 2.3 4区心理学

Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology Pub Date : 2026-09-01 Epub Date: 2026-05-03 DOI: 10.1007/s00359-026-01810-8

Hemal Faizpurkar, Douglas L Jones, Rama Ratnam

{"title":"Confusion and human errors in locating synthetic frog calls: Insights into the evolution of a vocal communication signal.","authors":"Hemal Faizpurkar, Douglas L Jones, Rama Ratnam","doi":"10.1007/s00359-026-01810-8","DOIUrl":"10.1007/s00359-026-01810-8","url":null,"abstract":"Vocal communication behavior in anurans is energetically expensive and can reveal caller locations, making them vulnerable to predation. Thus, it is likely that calls have been selected to minimize energy and make signals difficult to locate. In earlier work, Jones and Ratnam (2023) suggested that differences in the acoustic receivers of anurans and mammals may be exploited to make anuran calls difficult for mammals to locate, thereby reducing some if not all predation pressure. To test some of these ideas, this study examined sound localization performance in human listeners in response to a synthetic narrowband frog call (pulsed calls of the gray treefrog Dryophytes versicolor, 28% duty-cycle) and its variations, in a dichotic listening task using interaural time differences (ITD) alone. Sounds which were easy to locate (positive control) and difficult to locate (negative control) were also tested. Localization performance in response to synthetic calls (64%) lay between those of positive control (86%) and negative control (32%, chance level). We argue that differences in performance were largely a function of call bandwidth. Among all the variations of calls that were tested (excluding controls), the synthetic call most closely resembling the gray treefrog call had the lowest call energy, the narrowest spectral bandwidth, and was the most difficult to localize. We suggest that calls may have been selected to keep their energy as low as possible by reducing their duty cycle and reducing spectral leakage to maintain narrowband characteristics.","PeriodicalId":54862,"journal":{"name":"Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology","volume":" ","pages":"855-867"},"PeriodicalIF":2.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147823547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Greater Japanese horseshoe bats (Rhinolophus nippon) gradually converge their echolocation call frequency to colony members. 大日本马蹄蝠（Rhinolophus nippon）逐渐收敛其回声定位呼叫频率到群体成员。

IF 2.3 4区心理学

Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology Pub Date : 2026-09-01 Epub Date: 2026-06-23 DOI: 10.1007/s00359-026-01821-5

Haruhito Matsumoto, Soshi Yoshida, Shizuko Hiryu

{"title":"Greater Japanese horseshoe bats (Rhinolophus nippon) gradually converge their echolocation call frequency to colony members.","authors":"Haruhito Matsumoto, Soshi Yoshida, Shizuko Hiryu","doi":"10.1007/s00359-026-01821-5","DOIUrl":"10.1007/s00359-026-01821-5","url":null,"abstract":"In bats using CF-FM echolocation calls, CF component frequencies vary among colonies, across geographic regions, and between sexes. In this study, we investigated frequency changes of the second harmonic of the CF component (CF2), which is the dominant harmonic in the multi-harmonic echolocation calls, that occur following the mixed housing of resident and wild-caught populations of greater Japanese horseshoe bats (Rhinolophus nippon). By focusing on individual-level frequency adjustments in the context of colony mixing, we tracked CF2 frequencies in a total of 101 individuals across 15 capture events over a one-month period. CF2 frequencies initially differed between the resident and wild-caught populations. These intergroup frequency differences gradually decreased after mixing, accompanied by a reduction in overall variability within the colony. This convergence was achieved asymmetrically, such that bats with lower CF2 frequencies adjusted their frequencies upward, while bats with higher CF2 frequencies individuals showed little or no change. No systematic changes were observed when initial frequencies did not differ between two groups. Echolocation in group contexts would be expected to suffer from severe acoustic interference caused by overlapping calls from conspecifics; however, CF bats instead tend to converge on a shared CF frequency. Because this convergence was primarily driven by individuals using lower frequencies, it may be interpreted as a strategy to allow individuals to share a \"silent spectral window\" above the CF2 frequency, which is critical for Doppler-based detection. In other words, for CF bats, in which the use of Doppler information is fundamentally important, frequency convergence may function as a strategy for avoiding acoustic interference.","PeriodicalId":54862,"journal":{"name":"Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology","volume":" ","pages":"835-844"},"PeriodicalIF":2.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13642455/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148310349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A somatosensory fovea in the fingertips of the Surinam toad. 苏里南蟾蜍指尖的体感中央窝。

IF 2.3 4区心理学

Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology Pub Date : 2026-09-01 Epub Date: 2026-08-10 DOI: 10.1007/s00359-026-01838-w

Christopher J Meredith, Rebeca W Fuquen, Sophia Manfrey, Penelope Chai, Duncan B Leitch

{"title":"A somatosensory fovea in the fingertips of the Surinam toad.","authors":"Christopher J Meredith, Rebeca W Fuquen, Sophia Manfrey, Penelope Chai, Duncan B Leitch","doi":"10.1007/s00359-026-01838-w","DOIUrl":"10.1007/s00359-026-01838-w","url":null,"abstract":"The Surinam toad (Pipa pipa) is a fully aquatic, tongueless pipid frog that captures prey using rapid suction feeding coordinated by the forelimbs. The digit tips bear distinctive lobed structures whose function has been unknown. Here we characterize the morphology, mechanical sensitivity, peripheral innervation, central representation, and behavioral function of these digit tip lobes using scanning electron microscopy, von Frey threshold measurements, in vivo electrophysiology of the brachial nerve and optic tectum, and high-speed video analysis (1000 fps). SEM reveals a progressive quadrification yielding 128 terminal lobules per frog, bearing dome-shaped papillae at 142 ± 18/mm2-nearly fourfold the density on adjacent digit shaft skin. Distal lobule tips have the lowest mechanical thresholds on the forelimb (median 0.07 mN). Brachial nerve recordings reveal disproportionately represented, low-threshold, predominantly rapidly adapting mechanoreceptive afferents with small receptive fields confined to the lobules, some also responsive to water current stimulation. Tectal mapping shows the digit tips are somatotopically represented and disproportionately magnified, occupying 34% of the forelimb representation despite comprising only 8% of forelimb surface area (magnification factor: 4.3×). High-speed behavioral recordings under visible light, infrared, and cobalt-blocked lateral line conditions demonstrate that frogs initiate suction feeding before prey fish contact the digits, indicating detection of hydrodynamic disturbances at short range (~ 5 mm). These results establish the digit tip lobes of Pipa pipa as somatosensory foveae-specialized mechanoreceptive organs analogous to the tactile fovea of the star-nosed mole.","PeriodicalId":54862,"journal":{"name":"Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology","volume":" ","pages":"965-984"},"PeriodicalIF":2.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13642415/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148708527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0