Brodmann area 44, or BA44, is part of the frontal cortex in the human brain. Situated just anterior to
premotor cortex (BA6) and on the lateral
surface, inferior to BA9.
This area is also known as pars opercularis (of the inferior frontal gyrus), and it refers to a subdivision of the
cytoarchitecturally defined frontal region of cerebral cortex. In the human it
corresponds approximately to the opercular part of inferior frontal gyrus (H). Thus, it is bounded caudally by the inferior
precentral sulcus (H) and rostrally by the anterior ascending limb of lateral
sulcus (H). It surrounds the diagonal sulcus (H). In the depth of the lateral sulcus it
borders on the insula. Cytoarchitectonically it is bounded caudally and dorsally by the
agranular frontal area 6, dorsally by the granular
frontal area 9 and rostrally by the triangular area 45 (Brodmann-1909).
Functions
- Together with BA 45 it comprises Broca's area
a region involved in semantic tasks. Some data suggest that BA44 is more involved in phonological and syntactic processing. Some
recent findings also suggest the implication of this region in music perception.
External links
- For Neuroanatomy of this area visit BrainInfo
See also
|
Brain: telencephalon (cerebrum,
cerebral cortex, cerebral
hemispheres) |
| Primary sulci/fissures |
Medial
longitudinal, Lateral, Central,
Parietoöccipital, Calcarine,
Cingulate, Callosal Collateral fissure |
| Frontal lobe |
Precentral gyrus (Primary motor cortex,
4), Precentral sulcus, Superior frontal gyrus/Frontal eye fields
(6, 8, 9), Middle frontal gyrus (46), Inferior frontal gyrus (44-Pars opercularis, 45-Pars triangularis), Orbitofrontal cortex (10, 11, 12, 47) |
| Parietal lobe |
Somatosensory cortex (Primary (1, 2, 3, 43), Secondary (5)), Precuneus
(7m), Parietal lobules (Superior
(7l), Inferior (40)), Angular gyrus (39), Intraparietal sulcus, Marginal sulcus |
| Occipital lobe |
Primary
visual cortex (17), Cuneus, Lingual gyrus,
18, 19 - Lateral occipital sulcus |
| Temporal lobe |
Primary auditory
cortex (41, 42),
Superior temporal gyrus (38,
22), Middle temporal gyrus
(21), Inferior temporal gyrus
(20), Fusiform gyrus (37) Medial temporal lobe (Amygdala, Hippocampus, Parahippocampal gyrus (27, 28, 34, 35,
36) |
| Cingulate cortex/gyrus |
Subgenual
area (25), anterior cingulate
(24, 32, 33), Posterior cingulate (23, 31), Retrosplenial
cortex (26, 29, 30), Supracallosal gyrus |
| white matter tracts |
Corpus callosum
(Splenium, Genu, Rostrum, Tapetum), Septum pellucidum, Ependyma, Internal capsule, Corona radiata, External capsule, Olfactory tract, Fornix (Commissure of fornix), Anterior commissure, Posterior commissure
Terminal stria |
| Basal ganglia |
Striatum
(Putamen,Caudate nucleus, Nucleus accumbens), Globus pallidus, Claustrum, Subthalamic nucleus, Substantia nigra |
| Other |
Insular cortex
Olfactory bulb, Anterior olfactory
nucleus Septal nuclei Basal optic
nucleus of Meynert |
| Some categorizations are approximations,
and some Brodmann areas span gyri. |
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