As a result, the GCC analysis revealed that characteristic thinning of the GCC in the temporal hemiretina of the ipsilateral eyes and in the nasal hemiretina of the contralateral eyes corresponded to the optic tract
The anterior division is connected to the eyes and frontal filaments via the optic tracts
, and the posterior division is connected to the antennules via the antennular nerves [ILLUSTRATION FOR FIGURE 4A OMITTED].
Items Length (mm) Width (mm) (Mean [+ or -] SE) (Mean [+ or -] SE) Total brain 58.48 [+ or -] 0.44 (a) 42.63 [+ or -] 0.63 (b) Wulst 28.75 [+ or -] 0.32 (a) 10.88 [+ or -] 0.43 (b) Cerebral hemisphere 31.88 [+ or -] 0.43 (a) 20.50 [+ or -] 0.46 (b) Olfactory lobe 15.15 [+ or -] 0.67 (a) 8.75 [+ or -] 0.32 (b) Optic lobe 16.38 [+ or -] 0.43 (a) 8.48 [+ or -] 0.48 (b) Pineal body 6.93 [+ or -] 0.22 (a) 6.40 [+ or -] 0.22 (a) Cerebellum 26.75 [+ or -] 0.32 (a) 18.70 [+ or -] 0.34 (b) Medulla oblongata 18.85 [+ or -] 0.43 (a) 12.78 [+ or -] 0.34 (b) Hypophysis 8.23 [+ or -] 0.34 (a) 9.13 [+ or -] 0.43 (a) Optic tract
7.98 [+ or -] 0.21 (a) 3.35 [+ or -] 0.25 (b) Infundibulum 4.25 [+ or -] 0.32 (a) 3.48 [+ or -] 0.21 (a)
Lateral geniculate body: Lateral geniculate body is an oval structure located at termination of optic tracts
. Each geniculate body consists of 6 layers of neurons.
Ilg, "Callosal and superior temporal sulcus contributions to receptive field properties in the macaque monkey's nucleus of the optic tract
and dorsal terminal nucleus of the accessory optic tract
," Journal of Comparative Neurology, vol.
Swinging flashlight test: This is one of the most important objective tests for the detection and quantification of abnormalities of the retina, optic nerve, optic chiasm or optic tract
. It compares the afferent input from these structures in each eye.
Retrochiasmal Lesions (affecting the optic tract
, lateral geniculate body, optic radiation) cause a partial or complete homonymous hemianopia.
For example, unilateral damage to VI, the optic tract
(the section of the pathway that relays information from the optic chiasm to the LGN), or the LGN itself can lead to contralateral homonymous hemianopia (see Figure 2b), (9) while unilateral damage to Meyer's loop of the optic radiations often results in homonymous quadrantanopia (see Figure 2c).
(4) Habu et al found a pituitary stalk mass in 63.7% of patients, a hypothalamic mass lesion in 17.4%, loss of hyperintensity at the neurohypophysis in 82.3%, intratumoral hemorrhage in 8.5%, constriction of the tumor at the diaphragmatic hiatus resulting in a dumbbell shape in 44.7%, hyperintensity around the optic tract
in 11.5%, and contrast enhancement of the dura mater around the pituitary fossa in 17.1%.
The optic nerve passing optic canal ran from the eyeball to the optic chiasm; the optic tract
ran from the optic chiasm to the lateral geniculate nucleus; the optic radiation ran from the lateral geniculate nucleus to the calcarine sulcus (Fig.
In fact, GH and GH mRNA proteins have also been identified in retinal ganglion cells and can be traced within their axons in the retina within the optic fibre layer and outside the retina within the optic nerve, optic chiasm and optic tract