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Titolo:
Functional organization of squirrel monkey primary auditory cortex: Responses to pure tones
Autore:
Cheung, SW; Bedenbaugh, PH; Nagarajan, SS; Schreiner, CE;
Indirizzi:
Univ Calif San Francisco, Dept Otolaryngol, Coleman Mem Lab, Div Otol Neurotol & Skull Base Surg, San Francisco, CA 94143 USA Univ Calif San Francisco San Francisco CA USA 94143 ancisco, CA 94143 USA Univ Calif San Francisco, Dept Otolaryngol, WM Keck Ctr Integrat Neurosci,San Francisco, CA 94143 USA Univ Calif San Francisco San Francisco CA USA 94143 ancisco, CA 94143 USA Univ Florida, Inst Brain, Dept Neurosci, Gainesville, FL 32610 USA Univ Florida Gainesville FL USA 32610 Neurosci, Gainesville, FL 32610 USA Univ Florida, Inst Brain, Dept Otolaryngol, Gainesville, FL 32610 USA UnivFlorida Gainesville FL USA 32610 laryngol, Gainesville, FL 32610 USA Univ Utah, Dept Bioengn, Salt Lake City, UT 84112 USA Univ Utah Salt LakeCity UT USA 84112 oengn, Salt Lake City, UT 84112 USA
Titolo Testata:
JOURNAL OF NEUROPHYSIOLOGY
fascicolo: 4, volume: 85, anno: 2001,
pagine: 1732 - 1749
SICI:
0022-3077(200104)85:4<1732:FOOSMP>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELECTRICAL COCHLEAR STIMULATION; SPECIES-SPECIFIC VOCALIZATION; MULTIPLE-NEURON RECORDINGS; TONOTOPIC ORGANIZATION; OWL MONKEY; FREQUENCY REPRESENTATION; ARCHITECTONIC FIELDS; COMMON MARMOSET; CORTICAL FIELDS; MACAQUE MONKEYS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
69
Recensione:
Indirizzi per estratti:
Indirizzo: Cheung, SW Univ Calif San Francisco, Dept Otolaryngol, Coleman Mem Lab, Div Otol Neurotol & Skull Base Surg, Box 0342 A730 400 Parnassus Ave, San Francisco, CA 94143 USA Univ Calif San Francisco Box 0342 A730 400 Parnassus Ave San Francisco CA USA 94143
Citazione:
S.W. Cheung et al., "Functional organization of squirrel monkey primary auditory cortex: Responses to pure tones", J NEUROPHYS, 85(4), 2001, pp. 1732-1749

Abstract

The spatial organization of response parameters in squirrel monkey primaryauditory cortex (AI) accessible on the temporal gyrus was determined with the excitatory receptive field to pure tone stimuli. Dense, microelectrode mapping of the temporal gyrus in four animals revealed that characteristic frequency (CF) had a smooth, monotonic gradient that systematically changedfrom lower values (0.5 kHz) in the caudoventral quadrant to higher values (5-6 kHz) in the rostrodorsal quadrant. The extent of AI on the temporal gyrus was similar to4 mm in the rostrocaudal axis and 2-3 mm in the dorsoventral axis. The entire length of isofrequency contours below 6 kHz was accessible for study. Several independent, spatially organized functional response parameters were demonstrated for the squirrel monkey AI. Latency, the asymptotic minimum arrival time for spikes with increasing sound pressure levels at CF, was topographically organized as a monotonic gradient across AI nearly orthogonal to the CF gradient. Rostral AI had longer latencies (range= 4 ms). Threshold and bandwidth co-varied with the CF. Factoring out the contribution of the CF on threshold variance, residual threshold showed a monotonic gradient across AI that had higher values (range = 10 dB) caudally. The orientation of the threshold gradient was significantly different from the CF gradient. CF-corrected bandwidth, residual Q10, was spatially organized in local patches of coherent values whose loci were specific for eachmonkey. These data support the existence of multiple, overlying receptive field gradients within AI and form the basis to develop a conceptual framework to understand simple and complex sound coding in mammals.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 14:54:25