Introduction (2)

Question 1

Where does the T10 dermatome innervate?

Answer 1

Skin above umbilical region of abdomen

Question 2

What is the effect of lower MN lesion?

Answer 2

Flaccid paralysis
Muscle wasting
Fibrillation
Recovery possible through formation of new collaterals - innervate other muscle fibres

Question 3

What is the effect of upper MN lesion?

Answer 3

Spastic paralysis
No muscle wasting
Babinksi sign - stroke sole of foot - big toe points up
No recovery - axons die - space replaced with astrocytes

Question 4

What is the role of the superior colliculus?

Answer 4

Controls eye movements

Question 5

What is the role of the inferior colliculus?

Answer 5

Auditory processing

Question 6

What is the role of the periaqueductal grey?

Answer 6

Descending pain modulation

Question 7

What is the role of the red nucleus?

Answer 7

Motor coordination

Question 8

What does the basilar artery supply and what is the result of its blockage?

Answer 8

Rostral side of pons

Locked-in syndrome