B7.014 Neurologic Diagnosis, A Review of Concepts

Question 1

differentiation between UMN and LMN injury

Answer 1

UMN: hyperreflexia, increased tone, mild atrophy
LMN: hyporeflexia, decreased tone, severe atrophy

Question 2

how to distinguish lower brachial plexopathy from C8 radiculopathy

Answer 2

test the ulnar nerve SNAP

ulnar SNAP will be present in radiculopathy, but may be absent in plexopathy

Question 3

selective vulnerability of focal lesions

Answer 3

shared anatomy

• proximity
• blood supply

Question 4

selective vulnerability of diffuse lesions

Answer 4

shared physiology

• toxin sensitivity
• metabolic insult sensitivity

Question 5

locations for focal lesions in the midline of the visual systems that would cause bilateral blindness

Answer 5

optic chiasm
occipital lobe
basilar occlusion

Question 6

diffuse lesions of the visual systems that would cause bilateral blindness

Answer 6

retina/optic nerve sensitive toxins

visual radiations / occipital cortex

Question 7

how to test for true blindness or a conversion response

Answer 7

1. constriction to light

2. ability to focus and track objects