Lec 11

Question 1

what are the effects of damage to whole one side of somatosensory cortex

Answer 1

complete sensory loss of contralateral side of body

Question 2

what are the effects of damage to lateral pontine or medulla

Answer 2

loss of sense in contralateral whole side of body (neck downwards) and loss of sense in ipsilateral face.

Question 3

What is a transverse cord lesion

symptoms

some causes

Answer 3

damage across the whole cross section of spinal cord

• LMN symptoms at level of lesion
• UMN symptoms below region
• loss of all sense

Causes

• trauma
• tumors
• MS (autoimmune dis that affects CNS)

Question 4

what is central cord syndrome

symptoms

cuases

Answer 4

lesion to centre of cord - may affect a bit of posterior column and a bit of grey matter ‘

Symptoms:
- loss of sensations of pain, temp, crude touch (but why idk)

Causes
- Syringomyelia (fluid filled cavity in spinal cord)
- tumors
- MS

but what happen to areas below inj?

Question 5

define syringomyelia what is the perpetrator called?

Answer 5

fluid filled cavity in spinal cord, area called a syrinx

Question 6

What is posterior cord syndrome

symptoms

causes

Answer 6

lesion in the dorsal column area of spinal cord, may also affect anterior horn. Affects all segments below lesion.

symptoms
- loss of position and sense (proprio?) all areas below inj
- may

causes
- trauma
- tumors
- MS
- Vitamin b12 deficiency (leads to demyelination in post column)
- Tabes dorsalis (neurodegenerative disease, result of untreated syphilis)

Question 7

What is Tabes dorsalis

Answer 7

neurodegenerative disease, result of untreated syphilis

Question 8

What is anterior cord syndrome

symptoms

causes

Answer 8

Lesion to all of anterior side of spinal cord (bilateral). It spares the posterior columns

symptoms:
- loss of pain and temp sense loss
- Motor loss

Causes:
- trauma
- tumours
- MS
- Infarct (dead tiss by lack of blood supply)

Question 9

what is an infarct

Answer 9

area of tissue that is dead due to a lack of blood supply.

Question 10

What is Brown-Sequard syndrome.
What is another term for the syndrome.

Symptoms

Causes

Answer 10

Entire half of spinal cord.

Term: Hemi-cord lesion

Symptoms:
- Ipsilateral paralysis & loss of proprioception/vibration
- Contralateral loss of pain & temperature sensation

** at level of injury and 1 spinal segment below there is also pain and temp sense loss because spinothalamic tract fibers have not yet crossed (spinthal tract is part of antero-lateral path).