"Radiographically the pars opercularis can be identified as the most caudal vertically orientated portion of the inferior frontal gyrus which takes on a characteristic “M” configuration. This is also referred to as the M sign when identifying the inferior frontal gyrus3."
Expected headings
"Blood supply"
"Variant anatomy"
"Function"
"The pars opercularis corresponds to the area of cortex that is associated with Brodmann’s area 44 in the dominant hemisphere. Traditionally, together with Brodmann’s area 45 (a.k.a. pars triangularis), it is considered to constitute the classical Broca’s area. There is no clear functional segregation between areas 44 and 45. Broca’s area is well documented in its involvement in aspects of language and comprehension. Brodmann’s area 44 has also demonstrated some motor functions due to its interactions with neighbouring premotor areas. The same cortical region in the non-dominant hemisphere is involved in non-verbal communication such as gesticulation, facial expression and modulation of timing and intonation of speech 1,2,7."