Anatomy Flashcards
(139 cards)
Musculo-cutaneous nerve
C5-C7
Motor: Elbow flexion (biceps brachii) and supination
Sensory: Lateral part of the forearm
Mechanism/notes: Isolated injury is rare.
Usually injured as part of brachial plexus injury
Axillary nerve
C5, C6
Motor: Shoulder abduction (deltoid muscle)
Sensory: Inferior region of the deltoid muscle.
Mechanism/notes: Humeral neck fracture/dislocation
Flattened deltoid
Radial nerve
C5-T1
Motor: Extension (forearm, wrist, fingers, thumb)
Sensory: Small area between the dorsal aspect of the 1st and 2nd metacarpals
Mechanism/notes: Humeral midshaft fracture.
Palsy= wrist drop
Median nerve
C6-T1
Motor: LOAF muscles.
Depends on site of the lesion:
Wrist: paralysis of thenar muscles, opponens pollicis
Elbow: loss of pronation of forearm and weak wrist flexion
Sensory: Palmar aspect of lateral 3 1/2 fingers
Mechanism/notes: Wrist lesion = carpal tunnel syndrome
Ulnar nerve
C8, T1
Motor: Intrinsic hand muscles except LOAF. Also wrist flexion.
Sensory: Medial 1 1/2 fingers
Mechanism/notes: Medial epicondyle fracture
Claw hand
LOAF muscles
lateral 2 Lumbricalis
Opponens pollicis
Abductor pollicis brevis
Flexor pollicis brevis
Long thoracic nerve
C5-C7
Motor: serratus anterior
Sensory: none
Mechanism/notes: During sports> blow to the ribs, lifting weights.
Possible complication of mastectomy
Winged scapula
Wrist drop
Radial nerve
Foot drop
Common Peroneal Nerve
or
Sciatic nerve
Claw hand
Ulnar nerve
Paraesthesia of thumb, index and MIDDLE finger
Median nerve
Paraesthesia of little finger and ring finger
Ulnar nerve
Paraesthesia of the dorsal aspect of the thumb ± dorsal area between 1st (thumb) and 2nd fingers
Radial nerve
Numbness on superior aspect of upper arm just below shoulder joint.
Numbness over deltoid, paralyzed deltoid
Axillary nerve
Fibular neck fracture
Common Peroneal Nerve
Femur neck fracture
Sciatic nerve
Acetabular Fracture
Sciatic nerve
Humeral Shaft Fracture
Radial nerve
Humeral Neck Fracture
Axillary nerve
Winged “prominent” Scapula
More “winging”/dropping on pushing a wall
Long Thoracic Nerve
Dropped Scapula
More “winging”/dropping on abducting the arm at the shoulder level
Accesory nerve (11th CN)
Monteggia fracture
Anterior Dislocation of the head of radius + Fracture of the proximal 1/3 of the Ulna
Radial Nerve
Paraesthesia and impaired sensation in both hands
Glove distribution
Peripheral Neuropathy
Saturday night palsy
Radial nerve compression
Wrist drop
Can be compressed against the operating table