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Brodmann area 22 (BA 22) combined with Brodmann area 42 (BA 42) form Wernicke's area in the superior temporal gyrus in the temporal lobe.Using cytoarchitectonics, BA 22 is located in the superior temporal gyrus which separates it from the primary and secondary auditory cortex. [2]
The auditory cortex is involved in tasks such as identifying and segregating "auditory objects" and identifying the location of a sound in space. For example, it has been shown that A1 encodes complex and abstract aspects of auditory stimuli without encoding their "raw" aspects like frequency content, presence of a distinct sound or its echoes.
The superior temporal gyrus also includes Wernicke's area, which (in most people) is located in the left hemisphere. It is the major area involved in the comprehension of language. The superior temporal gyrus is involved in auditory processing, including language, but also has been implicated as a critical structure in social cognition. [2] [3]
However, there is an absence of consistent definitions as to the location. [5] [6] Some identify it with the unimodal auditory association in the superior temporal gyrus anterior to the primary auditory cortex (the anterior part of BA 22). [7]
Within the primary auditory cortex, the auditosensory cortex extends posteromedially over the gyrus. [2] Brodmann area 42 is an auditory core region bordered medially by Brodmann area 41 and laterally by Brodmann area 22. [ 2 ]
Cortex Primary visual cortex (V1) V2; V3; V4; Gyri. Lateral occipital gyrus; Other Cuneus; Brodmann areas 17 (V1, primary visual cortex); 18, 19; Temporal lobe. Cortex Primary auditory cortex (A1) Secondary auditory cortex (A2) Inferior temporal cortex; V5/MT; Posterior inferior temporal cortex; Gyri. Superior temporal gyrus; Middle temporal ...
For example, Brodmann areas 1, 2 and 3 are the primary somatosensory cortex; area 4 is the primary motor cortex; area 17 is the primary visual cortex; and areas 41 and 42 correspond closely to primary auditory cortex.
BA21 is a subdivision of the cytoarchitecturally defined temporal region of the cerebral cortex. BA21 is superior to BA20 and inferior to BA40 and BA41.It is bounded rostrally by the temporopolar area 38 (H), ventrally by the inferior temporal area 20, caudally by the occipitotemporal area 37 (H), and dorsally by the superior temporal area 22 (Brodmann-1909).