Spinal Cord Structure

Question 0

What does the anterior horn consist of?

Answer 0

Efferent (motor) neurons

Question 1

What is the spinal cord?

Answer 1

8 cervical
12 thoracic 
5 lumbar
5 sacral 
A few coccygeal

Question 2

Alpha motor neurons affect?

Answer 2

Muscles

Question 3

Gamma motor neurons effect?

Answer 3

Muscle spindles

Question 4

What does the posterior horn consist of?

Answer 4

Afferent (sensory) neurons

Question 5

What is the dorsal/medial lemniscal system for?

Answer 5

Convey sensations of proprioception, vibration and tactile discrimination

Question 6

What are the Spinothalamic tracts for?

Answer 6

Convey sensations of pain and temperature

Question 7

What are the spinoff rebelled tracts for?

Answer 7

Convey proprioception info from muscle spindles, Golgi tendons organs, touch and pressure receptors to cerebellum for voluntary muscle control.

Question 8

What are the spinoreticular tracts for?

Answer 8

To convey deep and chronic pain to reticular formation of brain stem

Question 9

What is the autonomic nervous system?

What are the two divisions?

Answer 9

Concerns with innervate one of involuntary structures: smooth muscle, heart, glands; helps maintain homeostasis.
Sympathetic and parasympathetic.

Question 10

What is the sympathetic division of the ANS responsible for?

Answer 10

(Thoracolumbar) Fight or flight, emergency responses, raises harts rate and BP, constricts peripheral blood vessels and redistributes blood.

Question 11

What is the parasympathetic division of the ANS for?

Answer 11

(Craniosacral) Conserves and restores homeostasis, slows heart rate and reduces BP, increases peristalsis.