Further, a higher cut shows the cortical sulci that are seen when one looks at the top of the brain.
The brain at 24-week gestation has no sulci or gyri except for the clefts separating the major hemispheres and lobes.
A palpable nodule or a hard irregular gland with loss of the median sulcus raises the suspicion of cancer.
The sulci are shallow but easily distinguishable, and visible on all specimens.
Lateral to this sulcus, two blunt ridges, extending about 15 mm caudally, indicate a ventral reinforcement of the mandible in the postsymphysial area.
Brothers (1997) reports that in primates, neurons in the superior temporal sulcus are responsive to faces including conspecifics eye movements, head, and gaze direction.
Malar sulcus replaced by a row of finer alveoli.
The twelve pairs of marginal scutes have their anterior sulcus cutting the posterior part of the posterior suprapygal.
