Spinocerebellar Tracts

Question 1

True or False:

The cerebellum has half of all the neurons in the cortex

Answer 1

True

Question 2

Are the subconscious pathways typically ipsilateral or contralateral

Answer 2

Ipsilateral

Question 3

How many neurons does the typical subconscious pathway have

Answer 3

2 a primary afferent and a projection neuron

Question 4

True or False
In the case of the spinocerebellar pathways, receptors are mainly encapsulated proprioceptors associated with large myelinated axons

Answer 4

True

Question 5

What do the spinocerebellar tracts convey information about

Answer 5

Limb and joint proprioception

Question 6

What are the spinocerebellar tracts used for (2)

Answer 6

1. Control of muscle tone

2. Influencing coordinated motor function

Question 7

What does the ventral spinocerebellar tract carry info about

Answer 7

The lower limbs

Question 8

How many times does the ventral spinocerebellar tract decussate

Answer 8

Twice (the only one that does so)

Question 9

What does the dorsal spinocerebellar tract carry info about

Answer 9

The lower limbs

Question 10

Which pathway carries information about past lower limb movements

Answer 10

Dorsal spinocerebellar tract

Question 11

Which pathway carries information about future lower limb movements

Answer 11

Ventral spinocerebellar tract

Question 12

What does the rostral spinocerebellar tract carry info about

Answer 12

The upper limbs

Question 13

What does the cuneocerebellar tract carry info about

Answer 13

The upper limbs

Question 14

Which pathway carries information about future upper limb movements

Answer 14

Rostral spinocerebellar tract

Question 15

Which pathway carries information about past upper limb movements

Answer 15

Cuneocerebellar tract

Question 16

True or False:

The dorsal and ventral spinocerebellar tracts run in parallel

Answer 16

True

Question 17

True or False:
The dorsal and ventral spinocerebellar tracts convey information about whole limb movements and postural adjustments to the cerebellum

Answer 17

True

Question 18

How many neurons do the dorsal and ventral spinocerebellar tracts have

Answer 18

2

Question 19

Does the dorsal spinocerebellar tract decussate twice like the ventral

Answer 19

Nope it never decussates

Question 20

What does damage to the dorsal and ventral spinocerebellar tracts result in

Answer 20

Loss of unconscious proprioception and subsequent coordination in the ipsilateral lower limb

Question 21

True or False:

The first order DRG of the ventral spinocerebellar tract is of the lumbo-sacral region

Answer 21

True

Question 22

What does the first order neuron innervate in the ventral spinocerebellar tract

Answer 22

Golgi tendon organs

Question 23

Where does the second order neuron of the ventral spinocerebellar tract first cross

Answer 23

In the anterior commissure of the spinal cord

Question 24

Where does the second order neuron of the ventral spinocerebellar tract cross for the second time

Answer 24

Superior cerebellar peduncles once in the cerebellum

Question 25

Where does the second order neuron of the ventral spinocerebellar tract terminate

Answer 25

In the vermal region of the anterior lobe of the cerebellum

Question 26

What does the dorsal spinocerebellar tract receive info from (2)

Answer 26

1. GTO

2. Muscle spindle

Question 27

Where does the first order neuron of the dorsal spinocerebellar tract send projections to

Answer 27

Nucleus dorsalis of Clarke (dorsal nucleus)

Question 28

Where does the nucleus dorsalis of Clarke run

Answer 28

C8-L2

Question 29

True or False:

The first order DRG of the dorsal spinocerebellar tract is a large diameter type I fiber

Answer 29

True

Question 30

What does the first order neuron of the dorsal spincerebellar tract innervate

Answer 30

Muscle spindles mainly and some GTOs

Question 31

Where does the second order neuron of the dorsal spinocerebellar tract run

Answer 31

Ipsilaterally in the dorsal nucleus of Clarke to the inferior cerebellar peduncles

Question 32

Where does the second order neuron terminate for the dorsal spinocerebellar tract

Answer 32

Cerebellar vermis of the anterior lobe

Question 33

What does the rostral spinocerebellar tract transmit info from

Answer 33

GTOs of the ipsilateral cranial half (arm) of the body

Question 34

Are the second order neurons of the rostral spinocerebellar tract in the nucleus dorsalis of Clarke

Answer 34

No they are rostral to it

Question 35

Where does the second order neuron of the rostral spinocerebellar tract send axons

Answer 35

Through the lateral funiculus to the cerebellum via the inferior cerebellar peduncle

Question 36

What does the first order neuron of the cuneocerebellar tract innervate (2)

Answer 36

1. GTOs

2. Muscle spindles

Question 37

Where do the fibers of the cuneocerebellar tract travel in the spinal cord

Answer 37

Fasciculus cuneatus

Question 38

Where does the first order neuron of the cuneocerebellar tract terminate on it’s second order neuron

Answer 38

Accessory cuneate nucleus of the medulla

Question 39

What is the accessory cuneate nucleus of the medulla located

Answer 39

Laterally to the cuneate nucleus

Question 40

What is the accessory cuneate nucleus the upper extremity equivalent of

Answer 40

Nucleus dorsalis of Clarke

Question 41

Where do the axons of the accessory cuneate nucleus travel

Answer 41

Backwards to the inferior cerebral peduncles and project to the ipsilateral vermis in the anterior lobe