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The structure of the ventral part of the lateral geniculate nucleus. A cyto‐ and myeloarchitectonic study in the cat

1972; Wiley; Volume: 145; Issue: 3 Linguagem: Inglês

10.1002/cne.901450302

1096-9861

Hans Jordan, H. Holländer,

Neurogenesis and neuroplasticity mechanisms

Abstract The cyto‐ and myeloarchitectonic organization of the ventral nucleus of the lateral geniculate body (LGV) were investigated by means of several histological series sectioned in different planes. Twenty‐one hemispheres of normal adult cats were used. The shape of the nucleus and its anatomical relationships with the optic tract, the dorsal nucleus of the lateral geniculate body (LGD) and the zona incerta were established. The LGV is club‐shaped with a broad main part and a slender stalk, which is twisted around the rostrolateral aspect of the optic tract. Caudolaterally the LGV is covered by the optic tract and dorsomedially it is apposed to the LGD. Rostromedially it merges with the thalamic reticular nucleus and ventromedially its stalk is continuous with the transition zone between the reticular nucleus and the zona incerta. Cell sizes were also measured. Five subdivisions of the nucleus were identified and their spatial interrelationships were determined: LGVa, LGVd and LGVe being composed of small cells exclusively, LGVb and LGVc containing both small‐ and medium‐sized nerve cells. LGVa and LGVb are situated at the rostral part of the nucleus both fusing rostrally with the reticular nucleus of thalamus. LGVd occupies the caudal end of the nucleus. LGVe is situated along the contact zone with the optic tract and is combined with LGVc. LGVb is located between LGVa, LGVc and LGVd.