Brain Body Connection Week 1

Question 1

3 Layers of Meninges

Answer 1

Dura, Arachnoid, Pia Mater

Question 2

Proportion of Neurons that cross over above spinal cord

Answer 2

85%

Question 3

Effect of UMN injury

Answer 3

Increased tone (spasticity), Resistance to passive movements, arc reflex cannot be overriden

Question 4

Proprioceptors Located in Muscles/Tendon

Answer 4

Muscle spindles, Golgi tendon organ

Question 5

Peripheral Nerve Lesion Effects

Answer 5

Decreases activity in muscle, if muscle wholly supplied by nerve, no more activity in muscle at all

Question 6

Effect if Ascending pathways cut

Answer 6

decreased sensation on one side of body, sensation loss can be vague, global

Question 7

Where is sensory info. perceived

Answer 7

Cerebrum

Question 8

What arteries form the cerebroarterial circle

Answer 8

Vertebral, Corotid

Question 9

Three Pathological Mechanisms for a CVA (stroke)

Answer 9

Aneurysm, Embolism, Blockage

Question 10

Effect of Spinal Nerve Lesion

Answer 10

loss of sensation in dermatome area supplied by spinal nerve, partial loss of activity in plexuses supplied by spinal nerve

Question 11

Vascular Supply to the Brain

Answer 11

Right/Left common carotid arteries -> Internal carotid artery
Vertebral Arteries