Transverse temporal gyrus

The temporal gyri transverse processes ( Brodmann 's area 41; according to Richard Heschl also called Heschl cross turns) form (also called the primary auditory cortex ) in their entirety, the primary auditory cortex. They are caused by the removal of the pars opercularis of the inferior frontal gyrus macroscopically visible.

The primary auditory cortex receives its afferents on the Hörstrahlung ( radiotherapy acustica ) from the medial geniculate body (proportion of metathalamus ). Hörstrahlung and medial geniculate body are the terminal portions of the auditory pathway. The Hörbahnfasern from the medial geniculate nucleus terminate in the primary auditory cortex in tonotopischer arrangement, which means that the representations of different sound frequencies occupy specific areas in the auditory cortex.

In the primary auditory cortex noises are not interpreted; Rather, here sounds are perceived consciously. The sensible combination of sounds and their interpretation place after wiring instead to the secondary auditory cortex.

Damage to the primary auditory cortex does not usually lead to total deafness but to hearing impairment, as both primary Hörrinden of both ears obtained by partial crossing of afferent nerve fibers. However, then the directional hearing is severely limited.