Brodmann area 22
Brain: Brodmann area 22 Brodmann area 22 (orange) Image of brain with Brodmann areas numbered NeuroLex ID birnlex_1753

Brodmann area 22 is one of Brodmann's cytologically defined regions of the brain. It is involved in auditory processing.

Contents

• 1 Human
• 2 Guenon
• 3 External links
• 4 See also

Human

Brodmann area 22 is a region of the human brain (the 22nd numbered Brodmann area). On the left side of the brain this area helps with generation and understanding of individual words. On the right side of the brain it helps tell the difference between melody, pitch, and sound intensity, that is prosody. Researchers believe this part of the brain is active in processing language.

This area is also known as superior temporal area 22, and it refers to a subdivision of the cytoarchitecturally defined temporal region of cerebral cortex. In the human it corresponds approximately to the lateral and caudal two thirds of the superior temporal gyrus. It is bounded rostrally by the temporopolar area 38 (H), medially by the posterior transverse temporal area 42 (H), ventrocaudally by the middle temporal area 21 and dorsocaudally by the supramarginal area 40 (H) and the angular area 39 (H) (Brodmann-1909).

The posterior section of Brodmann area 22 is home to Wernicke's area (most commonly in the left hemisphere only).

Guenon

Brodmann area 22 is a subdivision of the cerebral cortex of the guenon defined on the basis of cytoarchitecture. It is cytoarchitecturally homologous to the superior temporal area 22 of the human (Brodmann-1909). Distinctive features (Brodmann-1905): compared to Brodmann area 21-1909 the cortical thickness of area 22 is greater; cell density is reduced overall and the internal granular layer (IV) is even less developed with fewer cells; there is no detectable boundary between the internal pyramidal layer (V) and the multiform layer (VI); as in area 21, the ganglion cells of layer V are numerous and are arrayed adjacent to its boundary with layer IV, but they are plumper and more pyramidal in shape; the polymorphic cells of the multiform layer (VI) become gradually more numerous as one goes deeper and gives way to a wide sublayer 6b of fusiform cells as one approaches the boundary of the cortex with the subcortical white matter.

External links

• For Neuroanatomy of the superior temporal area 22 visit BrainInfo
• For Neuroanatomy of Brodmann area 22 visit BrainInfo

See also

• Brodmann area
• List of regions in the human brain

This neuroanatomy article is a stub. You can help Wikipedia by expanding it. v • d • e v • d • e Human brain: forebrain (cerebrum · cerebral cortex · cerebral hemispheres, grey matter) (TA A14.1.09.002–240, 301–320, GA 9.818–826) Frontal lobe Superolateral Prefrontal

Superior frontal gyrus (4l, 6l, 8l) · Middle frontal gyrus (9l, 10l, 46)

Inferior frontal gyrus: 11l · 47-Pars orbitalis · Broca's area (44-Pars opercularis, 45-Pars triangularis)

Superior frontal sulcus · Inferior frontal sulcus Precentral Precentral gyrus · Precentral sulcus Medial/inferior Prefrontal

Superior frontal gyrus (4m, 6m) · Medial frontal gyrus (8m, 9m)

Paraterminal gyrus/Paraolfactory area (12) · Straight gyrus (11m) · Orbital gyri/Orbitofrontal cortex (10m, 11m, 12) · Ventromedial prefrontal cortex (10m) · Subcallosal area (25)

Olfactory sulcus · Orbital sulci Precentral Paracentral lobule (4) · Paracentral sulcus Both Primary motor cortex (4) · Premotor cortex (6) · Supplementary motor area (6) · Frontal eye fields (8) Parietal lobe Superolateral

Superior parietal lobule (5l, 7l) · Inferior parietal lobule (40-Supramarginal gyrus, 39-Angular gyrus) · Parietal operculum (43)

Intraparietal sulcus Medial/inferior

Paracentral lobule (1m, 2m, 3m, 5m) · Precuneus (7m)

Marginal sulcus Both Postcentral gyrus/primary somatosensory cortex (1 · 2 · 3) · Secondary somatosensory cortex (5) · Posterior parietal cortex (7) Occipital lobe Superolateral Occipital pole of cerebrum · Lateral occipital gyrus (18, 19) · Lunate sulcus · Transverse occipital sulcus Medial/inferior Primary visual cortex (17) · Cuneus · Lingual gyrus
Calcarine fissure Temporal lobe Superolateral

Transverse temporal gyrus/Primary auditory cortex (41, 42) · Superior temporal gyrus (38, 22/Wernicke's area) · Middle temporal gyrus (21) · Inferior temporal gyrus (20)

Superior temporal sulcus · Inferior temporal sulcus Medial/inferior

Fusiform gyrus (37) Medial temporal lobe (27 · 28 · 34 · 35 · 36)

Inferior temporal sulcus Interlobar
sulci/fissures Superolateral Central (frontal+parietal) · Lateral (frontal+parietal+temporal) · Parieto-occipital · Preoccipital notch Medial/inferior Medial longitudinal · Cingulate (frontal+cingulate) · Collateral (temporal+occipital) · Callosal sulcus Limbic lobe Parahippocampal gyrus anterior (Entorhinal cortex, Perirhinal cortex) · Posterior parahippocampal gyrus · Prepyriform area Cingulate cortex/gyrus

Subgenual area (25) · Anterior cingulate (24, 32, 33) · Posterior cingulate (23, 31)

Isthmus of cingulate gyrus: Retrosplenial cortex (26, 29, 30) Hippocampal formation Hippocampal sulcus · Fimbria of hippocampus · Dentate gyrus · Rhinal sulcus Other Supracallosal gyrus · Uncus Insular lobe Long gyrus of insula · Short gyri of insula · Circular sulcus of insula General Operculum · Poles of cerebral hemispheres Some categorizations are approximations, and some Brodmann areas span gyri.

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