Motor System ppt 12-14

Question 1

Upper Motor Neuron

Answer 1

Brain–> anterior horn

Question 2

Lower Motor Neuron

Answer 2

Anterior Horn–> Muscle

Question 3

Upper Motor Neuron Lesion

Answer 3

MORE

muscle contraction
muscle tone
muscle reflexes
disuse (atrophy)

toes point UP

Question 4

Lower Motor Neuron Lesion

Answer 4

LESS

muscle contraction
muscle tone
muscle reflexes
muscle innervation (atrophy)

toes point DOWN

Question 5

ALS

Answer 5

Corticopinal tracts and Ant. Gray columns of the spinal cord

progressive muscular atrophy, paresis, and fasiculations are superimposed on the signs and symptoms of UMN disease with paresis, spasticity, and Babinski response

Question 6

Subacute Combined degeneration

Answer 6

Deficiency of vitamin B 12 results in pernicious anemia as well as degenerative changes in the dorsal and lateral funiculi of the spinal cord.
These patients have defects in both sensory and motor function.

Question 7

Poliomyelitis

Answer 7

Acute viral infection of the neurons of the anterior gray columns and the motor nuclei of the cranial nerves.

The muscles of the lower limb are more often affected than the muscles of the upper limb.

Question 8

Brown Sequard Syndrome

Answer 8

Same side : UMD weakness
Loss of position & vibration
Side Opposite: Loss of pain & temp.

Caused by fracture dislocation of the vertebral column, bullet, stab wound or expanding tumor