Neuro Anatomy

Question 1

Which is the nerve for elbow flexion?

Answer 1

Musculotaneous (c5-7)

Question 2

A flattened deltoid is a result of injury to which nerve?

Answer 2

Axillary nerve - c5, c6

Question 3

Damage to the radial nerve results in which symptoms?

Answer 3

Wrist drop (lack of forearm extension)

Question 4

What does damage to the ulnar nerve result in?

Answer 4

Claw hand

Question 5

A winged scapula suggests damage to which nerve?

Answer 5

Long thoracic nerve (inervates serratus anterior)

Sometimes caused by trauma or mastectomy

Question 6

Damage to upper brachial plexus due to shoulder dystocia during birth causes what?

Answer 6

Erbs- palsy (waiters tip) - brachial plexus c5-c6

Lower brachial plexus (c8-t1) - klumpke injury

Question 7

WhT dermatomone is the big toe?

Answer 7

Largest of the 5- L5

Smallest one - S1

Question 8

What is brown-sequard syndrome?

Answer 8

Hemi-section of the spinal.
Ipsilateral motor weakness, propriaception and vibration
Contralateral loss of pain and temperature

Question 9

Where does syringomyelia affect?

Answer 9

Ventral horns
Lateral spinothalamic tract

• flaccid paresis (hand muscles)
• loss of pain and temperature

Question 10

Where does neurosyphilis affect?

Answer 10

Dorsal column

- loss of proprioception and vibration

Question 11

What’s the route of the corticospinal tract?

Answer 11

Primary motor cortex (UMN A-alpha fibres) - internal capsule -
Decussates at medulla
Travel to cell bodies in central horn -
LMN leave ventral horn through the ventral root to muscles

Question 12

Fracture of the surgical head of humerus can damage which nerve?

Answer 12

Axilliary nerve

Question 13

Injury involving hanging off something damages which structure?

Answer 13

Brachial plexus (c8-t1), t1 also gives horners syndrome. 
Klumpkes paralysis - weak intrinsic hand muscles

Question 14

What is the difference between Bell’s palsy and stroke?

Answer 14

StrokeUMN - forehead spared

Bells CN 7 LMN - forehead affected

Question 15

What symptoms would you get with tonsillar conning (herniation)?

Answer 15

Compression of brain stem - cardio and resp centres

CN 6 palsy, up going plantars, irregular breathing - apnoea

Question 16

What symptoms would you get with transtentorial/uncal (herniation)?

Answer 16

Ipsi CN3 palsy
Contralateral hemiparesis
Could lead to compression of contralateral CST too causing ipsi hemiparesis

Question 17

What symptoms would you get with subfalcine (herniation)?

Answer 17

Frontal mass -> displacement of cingulate gurus -> compression of ACA -> stroke