Blood Supply Of Brain Stem

Question 1

Mention arteries supplying medulla oblongata

Answer 1

Anterior spinal artery
Posterior inferior cerebellar artery
Medullary branches of vertebral artert (supply intermediate area, olive)
Posterior spinal artery (supply posterior part of closed medulla, gracile & cuneate nuclei)

Question 2

Describe medial medullary syndrome

Answer 2

Anterior spinal art occlusion
Pyramid, contralateral hemiplegia, UMNL but flaccid paralysis
Medial leminiscus, C/L loss of fine touch & proprioception
XII nucleus, ipsilateral LMNL of tongue muscles

Question 3

Describe lateral medullary syndrome

Answer 3

1. Spinocerebellar & ICP, cerebellar ataxia
2. Spinal nucleus of V & spinal tract of V, ipsilateral loss of pain & temp from face
3. Spinal leminiscus, C/L loss of pain & temp from body
4. Nucleus ambiguus, ipsilateral paralysis of larynx, pharynx & palate
5. Nucleus solitarius, loss of taste
6. Descedning sympathetic fibers, Horner’s syndrome

Question 4

Mention blood supply of pons & lesion

Answer 4

Basilar artery branches
Pontine hemorrhage, pin-point pupil, hyperpyrexia, qaudriplegia

Question 5

Mention blood supply of midbrain

Answer 5

Posterior cerebral & superior cerebellar arteries