Anatomy Of EXTRA ∆

Question 1

Name Extra pyrimidal Tracts

Answer 1

2 arise from MIDBRAIN
tectospinal T
Rubrospinal T

2 arise from PONS (uncrossed)
Lateral Vestibulo-spinal.T
Pontine-Reticulospinal. T.

1 arise from MEDULLA
Medullary- Reticulospinal. T.

Question 2

1) Tecto spinal tract
Course
Function

Answer 2

A. Course.

Sup. Colliculi in midbrain →cross in dorsal Tegmentum→ Ant white colum Med group of Cervical AHCS

B: Turning Head,neck Hear, light, cutaneus touch

Question 3

2) Rubro Spinal tract

Answer 3

Course

Red nucleus (mid brain) → Cross in Ventral tegmentum→ Ant white column
→ end in Lat group of AHCs of cervical Segments.

Function: Muscle tone of upper limb

Question 4

3) Medial Vestibulospinal tract

Answer 4

Med vestibular nucleus. →Cross (Med longtiudinal bunde) + uncrossed → Anterior white column to T3.

→ end in a y neurons of extensors.

Question 5

4) Lateral Vestibulospinal tract

Answer 5

Course: lateral Vestibular nucleus → uncrossed fibers → whole Anterior white column. extensors muscles. → End a y neurons

Question 6

(5) ponto reticular tract.

Answer 6

pontine reticular formation → uncrossed to Anterior white column end in y In lamina lX 9

Question 7

(6) Medullo reticullo spinal tract.

Answer 7

Medullary reticular formation→ Cross → ventral white colum end in y neurons in lamina IX