Psychology of ageing

Question 1

How many neurons make up the spinothalamic pathway

Answer 1

3
One in the spinal cord, which synapses with the second in the dorsal root, the second then moves up the spinothalamic tract (then decussates) and synapses with the third neuron in the thalamus

Question 2

How many neurons make up the dorsal coloum medial leminiscus pathway

Answer 2

3
One in the spinal cord which synapses with the second in the gracile+cuneate nuclei of dorsal medulla, which then travels up the dorsal coloumn tracts synapsing with the third neuron in the thalamus

Question 3

How many neurons make up the corticospinal pathways

Answer 3

2

One spinal nerve which synapses with a motor neuron and decussates in the medulla