Motor and Somatosensory Tracts

Question 1

Cuneate fasciculus: carries fibers from what?

Answer 1

Upper limbs

Question 2

Gracile fasciculus: carries fibers from what?

Answer 2

Lower limbs

Question 3

Dorsal column medial lemniscus
Posterior column medial lemniscus
Which type of sensations?

Answer 3

SOMATOSENSORY
Fine touch
Vibration
Propioception

Question 4

Anterolateral tract
Spinothalamic tract
Which type of sensations?

Answer 4

Anterior - crude touch and pressure

Lateral - pain and temperature

Question 5

VPL (ventral posterolateral)

Nucleus for what?

Answer 5

Limbs

Question 6

VPM (ventral posteromedial)

Nucleus for what?

Answer 6

Face

Question 7

Corticospinal tracts: fibers direct towards?

Answer 7

Voluntary movement of the limbs

Question 8

Anterior corticospinal tract:

Answer 8

Fibers do not decussate until they reach spinal cord level which they innervate
Ipsilateral hemibody
Trunk (more proximal muscles)

Question 9

Lateral corticospinal tract:

Answer 9

Fibers decussate in pyramids of medulla
Contralateral hemibody
Hands (more distal muscles)

Question 10

Rubrospinal tract

Answer 10

Fibers decussate in red nucleus in midbrain

Fine motor control

Question 11

Reticulospinal tracts (M and L)

Answer 11

Decussate in medulla

Strength of contraction of muscles

Question 12

Vestibulospinal tract

Answer 12

Balance and posture
Do not decussate
Ipsilateral

Question 13

Tectospinal tract

Answer 13

Coordination of head movements with vision

Decussates in superior colliculus of midbrain