Tracts

Question 1

Fasciculus cuneatus

Answer 1

Ascending, posterior/dorsal column
Sensory for trunk, neck, UE
Priprioception, vibration, 2 point discrimination, graphesthesia

Question 2

Fasciculus gracilis

Answer 2

Ascending, posterior/dorsal column
Sensory for trunk and LE
Priprioception, vibration, 2 point discrimination, graphesthesia

Question 3

Spinocerebellar tract (dorsal)

Answer 3

Sensory ascends to cerebellum for ispilateral:

Subconscious proprioception, muscle tension, joint sense, posture of trunk and LE

Question 4

Spinocerebellar tract (ventral)

Answer 4

Some cross and recross at pons for ipsilateral:

Subconscious proprioception, muscle tension, joint sense, posture of trunk, UE, LE

Question 5

Spino-olivary tract

Answer 5

Ascends to cerebellum and relays info from cutaneous and proprioceptive organs

Question 6

Spinoreticular tract

Answer 6

Sensory tract providing afferent info from spinovisual reflexes and assists with movement of eyes and head towards a stimulus

Question 7

Spinotectular tract

Answer 7

Afferent pathway for reticular formation that influences LOC

Question 8

Spinotectal tract

Answer 8

Sensory tract providing afferent info for spinovisual reflexes and assists with movement of eyes and heads toward a stim

Question 9

Spinothalamic tract anterior

Answer 9

Sensory tract for light touch and pressure

Question 10

Spinothalamic tract lateral

Answer 10

Sensory tract for pain and temp sensation

Question 11

Corticospinal tract anterior

Answer 11

Pyramidal motor tract responsible for ipsi voluntary, discrete, and skilled movements

Question 12

Corticospinal tract lateral

Answer 12

Pyramidal motor tract responsible for contra voluntary fine movement

Question 13

Reticulospinal tract

Answer 13

Extrapyramidal motor tract responsible for facilitation or inhibition of voluntary and reflex activity through influence on alpha and gamma motor neurons

Question 14

Rubrospinal tract

Answer 14

Extrapyramidal motor tract responsible for motor input of gross postural tone, facilitating activity of flexor muscles, and inhibiting the activity of extensor muscles

Question 15

Tectospinal tract

Answer 15

Extrapyramidal motor tract responsible for contralateral postural muscle tone associated with auditory/visual stim

Question 16

Vestibulospinal tract

Answer 16

Extrapyramidal motor
Ispilateral gross postural adjustments subsequent to head movements
Facilitate extensors
Inhibit flexors

Question 17

A fibers general

Answer 17

Large
Myelinated
High conduction

Question 18

A alpha

Answer 18

Alpha motor nuerons
Muscle spindle primary ends
Golgi tendon organs
Touch

Question 19

A beta

Answer 19

Touch
Kinesthesia
Muscle spindle secondary endings

Question 20

A gamma

Answer 20

Touch
Pressure
Gamma motor neurons

Question 21

A delta

Answer 21

Pain
Touch
Pressure
Temp

Question 22

Muscle spindle - a fiber

Answer 22

Primary for low threshold stretch

Question 23

Muscle spindle secondary a fibers

Answer 23

Respond to changes in length

Question 24

Golgi tendon organs A alpha

Answer 24

Tension/stretch or tendon

Question 25

B fibers

Answer 25

Medium
Myelinated
Reasonably fast conduction
Pre-ganglionic fibers of autonomic system

Question 26

C fibers

Answer 26

Small
Poorly myelinated or unmyelinated
Slowed conduction
Post-ganglionic fibers of sympathetic system
Exteroceptors for pain, temp, touch