Anatomy Of ∆

Question 1

Lamination of primidal tracts.

Answer 1

Spinal cord:
cervical most medial
sacral most Lateral.

Internal capsule:
Face muscles in genue.
upper limbe most anterior
Lower limb most posterior

cerebral cortex: upside down.
Foot Medial surface
Face: Lower most.

Question 2

1) ventral corticospinal tract
Course and function

Answer 2

Cortex →Corona radiata →Ant post. 2/3 limb of internal capsule → 3/5 crus cerebri (mid brain) → scatered bundle (basis pontis)→
pyrimde in Medula
→ descend in spinal cord end AHCs (anterior group)

Function:Supply trunk muscles (Abdominal + Respiratory)

Question 3

2) Lateral Cortico Spinal Tract
Course and function

Answer 3

Cortex →Corona radiata →Ant post. 2/3 limb of internal capsule → 3/5 crus cerebri (mid brain) → scatered bundle (basis pontis)→
pyrimde in Medula → Decussate in Lowermost part of medulla
→ descend in spinal cord end AHCs (lateral group)

Function: Muscle of The Limbs

Question 4

what help Recovery in UMNL?

Answer 4

uncrossed ipsilateral Fibers→ Form the IPSILATERAL tract → join Lateral Corticospinal tract From The opposite side.

Question 5

3)Cortico blubar tract (corticonuclear).
Course and function

Answer 5

Cortex → nuclei of cranial nerves in mid brain. (contra lateral and ipsilateral)
For : Control muscles of head

Question 6

what recieve only contralateral corticonuclear Fiber

Answer 6

1. Lower part of Face
2. Hypoglossal nuclei →genioglossus muscle.

Question 7

what recieve only contralateral corticonuclear Fiber

Answer 7

1. Lower part of Face
2. Hypoglossal nuclei →genioglossus muscle.