Cortical cell lamination of the hemispheres of Papio hamadryas / by E.H.J. Schuster.

  • Schuster, Edgar Herman Joseph.
Date:
1911
Catalogue details

Licence: In copyright

Credit: Cortical cell lamination of the hemispheres of Papio hamadryas / by E.H.J. Schuster. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    Sulcus a remit us (arc.).—From the most posterior portion of the backwardly directed convexity of this fissure a straight branch runs upwards and backwards. The upper limb in the right hemisphere is united at its extremity with one of the sulci of the frontalis superior series. The lower limb in both hemispheres runs straight downwards and forwards, and ends about a centimetre above the anterior end of the Sylvian fissure. Sulcus inferior transversus (it.) runs obliquely upwards and forwards between the lower ends of the sulcus centralis and sulcus arcuatus; in the right hemisphere it is connected with the Sylvian fissure. Sulcus rectus (red.) runs horizontally forwards from a position about 5 mm. in front of the sulcus arcuatus, to end about the same distance from the frontal pole. Between its posterior end and the lower portion of the sulcus arcuatus lies the sulcus diagonalis (cl.), a shallow oblique fissure better marked in the right hemisphere than in the left. The sulcus praecentralis superior and sulcus frontalis superior (fs. 1, 2, 8, 4) are together repre- sented by a series of shallow fissures, of which the posterior (fs.^) is the best developed. This lies in a more or less sagittal direction, while the other members of the series are more transversely placed. On the orbital surface is found a sulcus orbital is (orb.) lying near the mesial border; this is triradiate in the right hemisphere, but a simple, more or less sagittal, fissure in the left. On the lateral side of this is the obliquely placed sulcus fronto-orbi tails (fo.), the anterior outer end of which just reaches the lateral surface of the hemisphere. This fissure is quite well defined, though not more than three or four millimetres deep. Its shape is complicated in the left hemisphere by the presence of a shallow forwardly directed bifurcated branch. The sulcus temporalis superior (Ts.) is a long, well- developed fissure extending both in front of and behind the Sylvian fissure. Its posterior end is bifurcated in the right