L7- CEREBRAL CORTEX; INTERNAL CAPSULE

Question 1

Anterior limb of the internal capsule and the fibers that pass through it

Answer 1

1. FRONTO-PONTINE FIBERS
2. cortico striate fibers
3. Medial fore brain bundle (orbital surface to hypothalamus)
4. ANTERIOR THALAMIC RADIATION
   i. Ant. nucleus to “cingulate gyrus”
   ii. Dorsomedial nucleus to prefrontal cortex
   iii. VA to premotor area
   iv. VL to motor area

Question 2

Genu of internal capsule and the fibers that pass through it

Answer 2

1. CORTICO-NUCLEAR fibers
2. Cortico reticular fibers
3. FRONTOPONTINE FIBERS
4. Anterior fibers of “superior thalamic radiation (VPL AND VPM to area 3, 1 &2)

Question 3

The retro lentiform part of the internal capsule and the fibers that pass through it

Answer 3

1. OPTIC RADIATION
2. Posterior thalamic radiation (pulvinar of the thalamus to area 18,19,39 &40)
3. PARIETO-PONTINE FIBERS
4. OCCIPITO-PONTINE FIBERS
5. Cortico-fungal fibers (from area 18 &19 to midbrain)

Question 4

The posterior limb of the internal capsule and the fibers that pass through it

Answer 4

1. CORTICO SPINAL TRACT
2. FRONTO- PONTINE (“ant. limb as well”)
3. PARIETO-PONTINE FIBERS
4. Cortico rubral fibers
5. Cortico striate fibers
6. SUPERIOR THALAMIC RADIATION
   i. area 4 with VA &VL nucleus of thalamus
   ii. area 3, 1 &2 with VPL & VPM nucleus of thalamus

Question 5

Fibers of the posterior limb of the internal capsule pass through…

Answer 5

Fasciculus sub thalamus
Fasciculus lenticularis
Nigrostriate fibers
Thalamostriate fibers

Question 6

The sublentiform part of the internal capsule and the fibers that pass thru it

Answer 6

1. AUDITORY RADIATION
2. Inferior thalamic radiation (fibers between auditory area and temporal lobe)
3. Fibers of Meyer’s loop of optic radiation (fibers from lower part of the peripheral retina)
4. TEMPERO-PONTINE FIBERS