Anatomy

Question 1

Which spinal sections have the most grey matter and why?

Answer 1

Cervical and Lumbar as this is where the legs and arms are

Question 2

Which spinal section has the least white matter and why?

Answer 2

Sacral as most of the neurons have come off.

Question 3

What part of the brain is the sensory seive for the tracts?

Answer 3

Thalamus

Question 4

What are the three neurons for spinothalamic

Answer 4

1. To spine
2. decussation to thalamus
3. thalamus to sensory cortex

Question 5

What are the three neurons for dorsal columns?

Answer 5

1. To medulla
2. crossing medulla to thalamus
3. to sensory cortex

Question 6

What are the three sensory tracts?

Answer 6

Spinothalamic - Pain and temp

Dorsal columns - soft touch, vibration, proprioreption

spinocerebellar - to cerebellum about joint perception

Question 7

What are the motor tracts?

Answer 7

Corticospinal

4 subconscious

Question 8

What are the main subconcious tracts?

Answer 8

Vestibulospinal - from inner ear to monitor head position

Tectospinal - sudden movements and loud noises

Reticulospinal - eyes

Rubrospinal - flexor and extensor muscles

Question 9

What is the main corticospinal tract?

Answer 9

Lateral, not anterior

Question 10

What does the pons and medullary pyramid look like?

Answer 10

Question 11

Label the following parts of the midbrain:

• cerebral aquaduct
• red nucleus
• substantia nigra
• crus cerebri
• CNIII nucleus

Answer 11