Neurologic organization Flashcards Preview

Neuro > Neurologic organization > Flashcards

Flashcards in Neurologic organization Deck (21):
1

LMN

Weakness/paralysis
Decreased/absent muscle tone
Decreased/absent reflex strength
Rapid muscle wasting

2

LMN caused by

poliomyelitis,
MN disease,
spinal cord injury,
peripheral nerve dysfunction,
muscle myotonias,
myasthenia gravis,
muscular dystrophies

3

UMN

Weakness/paralysis
Increased muscle tone
Increased reflex strength + babinski sign
Muscle mass maintained

4

UMN caused by

Stroke (contralateral symptoms), cord section

5

muscle

No sensory symptoms
Usually bilateral
Usually proximal weakness
Usually have muscle pain
Can have muscle atrophy

6

NMJ

No sensory symptoms
Usually bilateral
Fatiguability (weakness that varies w/ use of muscles)
Symptoms affect limbs and face

7

Peripheral Nerve

Usually affects BOTH sensory and motor
Does NOT usually affect both arm and leg on same side
Does NOT usually affect a full extremity

8

Mononeuropathy/__multiplex

Unilateral
Fits one nerve distribution
If multiple individual nerves --> mononeunropathy multiplex
asymmetric
Specific nerves

9

polyneuropathy

Bilateral
Distal > Proximal
Stocking/glove
Usually sensory, less commonly both, rarely pure motor

10

C5 myotome

deltoid: abduction of shoulder

11

C5/6 myotome

flexion of arm, biceps

12

C7 myotome

triceps reflex, elbow extension

13

L4 myotome

leg extension at knee, patellar tendon reflex

14

L5 myotome

dorsiflexion at angle

15

S1 myotome

plantar flexion at ankle
Achilles tendon reflex

16

LMN disease

No sensory symptoms
Systemic process (like polyneuropathy)
LMN signs

17

Spinal cord disease/lesion

Sensory level
Commonly split pain/temp and vibration/proprioception
No facial involvement

18

Brainstem lesion

Cranial nerve abnormality
Face involvement on one side, body involvement on the other
Usually affects a cranial nerve (with a few exceptions)

19

Internal capsule lesion

Equal face/arm/leg weakness
Less prominent or no sensory loss

20

Thalamus lesion

Often face/arm/leg numbness
Minimal to no motor loss

21

Cortex/Corona radiata lesion

Often affects higher functions:
language, attention, memory ,vision, visuospatial, behavior