Neuro A&P- spinal nerves

Question 1

Spinal Nerves

Answer 1

• are sensory, motor and mixed orientation

- each spinal nerve per hemisphere is connected by 2 roots

Question 2

Fasciculus Gracilis

Answer 2

Ascending sensory

- relates pressure, touch, vibration, kinesthesia to the CNS 
- only for lower extremities & trunk

Question 3

Fasciculus Cuneatus

Answer 3

Ascending sensory

• relates pressure, touch, vibration, kinesthesia to the CNS
• only for upper extremities

Question 4

Spinocerebellar

Answer 4

Ascending Sensory
- relates unconscious proprioception to CNS  muscles and tendon
Ventral potion fibers are crossed carrying info contralaterally
Dorsal portion  Direct  carry info ipsilaterally

Question 5

Spinothalamic

Answer 5

Ascending Sensory
- relates conscious awareness of pain, touch to the CNS
Ventral portion light pressure
Lateral portion  Pain temp

Question 6

Spinotectal tract

Answer 6

Ascending sensory
-sensory input to reflex
networks of brainstem

Question 7

Corticospinal (or Pyramidal)

Answer 7

• Lateral Corticospinal - crossed; carries motor commands for muscle control
  
  • Anterior Corticospinal - direct; motor commands for axial and girdle muscles

Question 8

Rubrospinal

Answer 8

motor commands for muscle tone; supporting the body against gravity

Question 9

Tectospinal

Answer 9

motor commands for regulation of body posture via visual/auditory signals

Question 10

Vestibulospinal

Answer 10

motor commands to accommodate balance and reflexive balance

Question 11

Reticulospinal (Reticular descending)

Answer 11

the motor command for muscle tone and for reflexes (alert activating system in the brainstem)