physiology of spinal cord

Question 1

What does lateral inhibition do?
How?

Answer 1

in motor processing Lateral inhibition sharpens or focusses signals

Via - Renshaw cells:groups of cells sitting close to motor neurons which transmit inhibitory signals to surrounding MNs

Question 2

What are Renshaw cells

Answer 2

Via Renshaw cells:groups of cells sitting close to motor neurons which transmit inhibitory signals to surrounding MNs

Question 3

Give two examples of muscles sensory organs/mechanoreceptors

Answer 3

Muscle spindles: in body of muscle, respond to muscle length

Golgi tendon organs: in muscle tendons, respond to tension

Question 4

What does a “muscle spindle” do?

Answer 4

Muscle spindles: in body of muscle, respond to muscle length

Question 5

what do Golgi tendon organs do?

Answer 5

Golgi tendon organs: in muscle tendons, respond to tension

Question 6

uncommon condition and presents with hemiplegia [paralysis of one side of the body] with contralateral pain and temperature sensation losses below the level of the lesion.

Answer 6

Brown squared - lesion on one half of cord

Question 7

Which sensations cross at the level of entry?

Answer 7

pain and temperature crosses at level of entry and everything else stays on the same side until the medulla