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Statements

Subject Item
n2:RIV%2F00064203%3A_____%2F13%3A10195142%21RIV14-MZ0-00064203
rdf:type
skos:Concept n10:Vysledek
rdfs:seeAlso
http://dx.doi.org/10.1016/j.heares.2012.11.021
dcterms:description
The auditory cortex (AC) of the rat has been the subject of many studies, yet the details of its functional organization are still not well understood. We describe here the functional organization of the AC in young rats (strain Long Evans, aged 30-35 days, anesthetized with ketamine/xylazine) on the basis of the neuronal responses to acoustic stimuli. Based on the neuronal responses to broad band noise (BBN) and pure tone bursts, the AC may be divided into the primary auditory cortex (AI) and three other core fields: anterior (AAF), suprarhinal (SRAF) and posterior (PAF) as well as an unspecific region (UR) inserted between the AI and AAF. The core fields are surrounded by a belt area. Neurons in the AI, AAF, SRAF and PAF showed well defined characteristic frequencies (CF) in response to pure tone stimulation; in contrast, UR neurons responded only at high intensities without a clear CF. Neurons responding only to BBN stimulation were found mostly in the belt area. The putative borders between the core fields were determined by changes in their tonotopic gradient; however, no tonotopic organization was found in the PAP. Neurons with the shortest response latencies to BBN stimulation were found in layer 4 (L4) and layer 6 (L6) in the AI, while those with the longest latencies in the superficial layers (L1/2) of the belt area. Similar principles of responsiveness were observed when the spike rate in response to BBN stimulation was evaluated, with the highest rate present in L4 of the AI and the lowest in L1/2 of the belt area. According to the shape of the peristimulus time histograms, the responses of neurons in the AC of the rat may be classified as pure onset, sustained, onset-sustained, double peak or late onset. The most dominant in all fields, as well as in all layers, was the pure onset response. Our findings offer further cues for understanding the functional organization of the AC in the rat. The auditory cortex (AC) of the rat has been the subject of many studies, yet the details of its functional organization are still not well understood. We describe here the functional organization of the AC in young rats (strain Long Evans, aged 30-35 days, anesthetized with ketamine/xylazine) on the basis of the neuronal responses to acoustic stimuli. Based on the neuronal responses to broad band noise (BBN) and pure tone bursts, the AC may be divided into the primary auditory cortex (AI) and three other core fields: anterior (AAF), suprarhinal (SRAF) and posterior (PAF) as well as an unspecific region (UR) inserted between the AI and AAF. The core fields are surrounded by a belt area. Neurons in the AI, AAF, SRAF and PAF showed well defined characteristic frequencies (CF) in response to pure tone stimulation; in contrast, UR neurons responded only at high intensities without a clear CF. Neurons responding only to BBN stimulation were found mostly in the belt area. The putative borders between the core fields were determined by changes in their tonotopic gradient; however, no tonotopic organization was found in the PAP. Neurons with the shortest response latencies to BBN stimulation were found in layer 4 (L4) and layer 6 (L6) in the AI, while those with the longest latencies in the superficial layers (L1/2) of the belt area. Similar principles of responsiveness were observed when the spike rate in response to BBN stimulation was evaluated, with the highest rate present in L4 of the AI and the lowest in L1/2 of the belt area. According to the shape of the peristimulus time histograms, the responses of neurons in the AC of the rat may be classified as pure onset, sustained, onset-sustained, double peak or late onset. The most dominant in all fields, as well as in all layers, was the pure onset response. Our findings offer further cues for understanding the functional organization of the AC in the rat.
dcterms:title
The response properties of neurons in different fields of the auditory cortex in the rat The response properties of neurons in different fields of the auditory cortex in the rat
skos:prefLabel
The response properties of neurons in different fields of the auditory cortex in the rat The response properties of neurons in different fields of the auditory cortex in the rat
skos:notation
RIV/00064203:_____/13:10195142!RIV14-MZ0-00064203
n10:predkladatel
n20:ico%3A00064203
n3:aktivita
n19:S n19:P n19:I
n3:aktivity
I, P(GAP303/12/1347), P(GBP304/12/G069), S
n3:cisloPeriodika
FEB 2013
n3:dodaniDat
n4:2014
n3:domaciTvurceVysledku
n13:6172245
n3:druhVysledku
n17:J
n3:duvernostUdaju
n8:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
102658
n3:idVysledku
RIV/00064203:_____/13:10195142
n3:jazykVysledku
n14:eng
n3:klicovaSlova
AXON TERMINALS; FREQUENCY REPRESENTATION; IN-VIVO; PYRAMIDAL NEURONS; ALBINO-RAT; GUINEA-PIG; INFERIOR COLLICULUS; FUNCTIONAL-ORGANIZATION; MEDIAL GENICULATE-BODY; SPECIES-SPECIFIC VOCALIZATIONS
n3:klicoveSlovo
n6:INFERIOR%20COLLICULUS n6:FREQUENCY%20REPRESENTATION n6:FUNCTIONAL-ORGANIZATION n6:GUINEA-PIG n6:AXON%20TERMINALS n6:SPECIES-SPECIFIC%20VOCALIZATIONS n6:IN-VIVO n6:ALBINO-RAT n6:MEDIAL%20GENICULATE-BODY n6:PYRAMIDAL%20NEURONS
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[39917D7C40D6]
n3:nazevZdroje
Hearing Research
n3:obor
n11:FH
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
3
n3:projekt
n9:GAP303%2F12%2F1347 n9:GBP304%2F12%2FG069
n3:rokUplatneniVysledku
n4:2013
n3:svazekPeriodika
296
n3:tvurceVysledku
Syka, Josef Profant, Oliver Burianová, Jana
n3:wos
000315761600006
s:issn
0378-5955
s:numberOfPages
9
n12:doi
10.1016/j.heares.2012.11.021