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Primary auditory cortex : ウィキペディア英語版
Auditory cortex

The primary auditory cortex is the part of the temporal lobe that processes auditory information in humans and other vertebrates. It is a part of the auditory system, performing basic and higher functions in hearing.〔Cf. Pickles, James O. (2012). ''An Introduction to the Physiology of Hearing'' (4th ed.). Bingley, UK: Emerald Group Publishing Limited, p. 238.〕
It is located bilaterally, roughly at the upper sides of the temporal lobes – in humans on the superior temporal plane, within the lateral fissure and comprising parts of Heschl's gyrus and the superior temporal gyrus, including planum polare and planum temporale (roughly Brodmann areas 41, 42, and partially 22).〔Cf. Pickles, James O. (2012). ''An Introduction to the Physiology of Hearing'' (4th ed.). Bingley, UK: Emerald Group Publishing Limited, pp. 215–217.〕 Unilateral destruction results in slight hearing loss, whereas bilateral destruction results in cortical deafness.
==Structure==
The auditory cortex was previously subdivided into primary (A1) and seco (A2) projection areas and further association areas. The modern divisions of the auditory cortex are the core (which includes A1), the belt, and the parabelt. The belt is the area immediately surrounding the core; the parabelt is adjacent to the lateral side of the belt.〔Cf. Pickles, James O. (2012). ''An Introduction to the Physiology of Hearing'' (4th ed.). Bingley, UK: Emerald Group Publishing Limited, p. 211 f.〕
Besides receiving input from the ears via lower parts of the auditory system, it also transmits signals back to these areas and is interconnected with other parts of the cerebral cortex.
Data about the auditory cortex has been obtained through studies in cats, macaques, and other animals. Thus, some knowledge about the human auditory cortex remains speculative.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Auditory cortex」の詳細全文を読む



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