Nerve Injuries Flashcards
Affected Nerve (Root) Suprascapular nerve (CS-C6) Muscle Weakness in
Supraspinatus, infraspinatus (arm lateral rotation)
Affected Nerve (Root) Axillary (circumflex) nerve (posterior cord; C5-C6) Muscle Weakness in
Deltoid, teres minor (arm abduction)
Affected Nerve (Root) Radial Nerve (C5-C6, T1) Muscle Weakness in
Triceps, wrist extensors,finger extensors(shoulder, wrist, and hand extension)
Affected Nerve (Root) Long thoracic nerve (C5-C6, [C7]) Muscle Weakness in
Serratus anterior (scapular control)
Affected Nerve (Root) Musculocutaneous Nerve (C5-C7) Muscle Weakness in
Coracobrachialis, biceps,brachialis (elbow flexion)
Affected Nerve (Root) Spinal accessory nerve (cranial nerve XI;C3-C4) Muscle Weakness in
Trapezius (shoulder elevation)
Affected Nerve (Root) Subscapular nerve (posterior cord;CS-C6) Muscle Weakness in
Subscapularis, teres major(medial rotation)
Affected Nerve (Root) Dorsal scapular nerve (C5) Muscle Weakness in
Levator scapulae, rhomboid major, rhomboid minor (scapular retraction and elevation)
Affected Nerve (Root) Lateral pectoral nerve (C5-C6) Muscle Weakness in
Pectoralis major, pectoralis minor
Affected Nerve (Root) Thoracodorsal nerve (C6-C7, [C8]) Muscle Weakness in
Latissimus dorsi
Inability to abduct arm beyond 90° w/ Pain in shoulder on abduction Possible Peripheral Nerve Involvement?
Spinal accessory nerve
Pain on flexing fully extended arm w/ Inability to flex fully extended arm Winging starts at 90° forward flexion Possible Peripheral Nerve Involvement?
Long thoracic nerve
Increased pain on forward shoulder flexion w/ Shoulder weakness (partial loss of humeral control) Pain increases with scapular abduction. Pain increases with cervical
rotation to opposite side. Possible Peripheral Nerve
Involvement?
Suprascapular nerve
Inability to abduct arm with neutral rotation Possible Peripheral Nerve Involvement?
Axillary (circumflex) nerve
Weak elbow flexion with forearm supinated Possible Peripheral Nerve Involvement?
Musculocutaneous nerve
Affected Nerve (Root) Median nerve C6-C8,Tl) Muscle Weakness in
Pronator teres Flexor carpi radialis Palmaris longus Flexor digitorum superficialis Flexor pollicis longus Lateral half of flexor digitorum profundus Pronator quadratus Thenar eminence Lateral two lumbricals
Affected Nerve (Root) Anterior interosseous nerve (branch of median nerve) Muscle Weakness in
Flexor pollicis longus Lateral half of flexor digitorum profundus Pronator quadratus Thenar eminence Lateral two lumbricals
Affected Nerve (Root) Ulnar nerve (C7 -C8,Tl) Muscle Weakness in
Flexor carpi ulnaris Medial half of flexor digitorum profundus Palmaris brevis Hypothenar eminence Adductor pollicis Medial two lumbricals All interossei
Affected Nerve (Root) Radial nerve (C5-8,Tl) Muscle Weakness in
Anconeus Brachioradialis Extensor carpi radialis longus and brevis Extensor digitorum Extensor pollicis longus and brevis Abductor pollicis longus Extensor carpi ulnaris Extensor indices Extensor digiti minimi
Affected Nerve (Root) • Posterior interosseous nerve (branch of radial nerve) Muscle Weakness in
Extensor carpi radialis brevis Extensor digitorum Extensor pollicis longus and brevis Abductor pollicis longus Extensor carpi ulnaris Extensor indices Extensor digiti minimi
Affected Nerve (Root) Median nerve (C6-C8,
Tl; carpal tunnel)
Muscle Weakness in
Flexor pollicis brevis
Abductor pollicis brevis
Opponens pollicis
Lateral two lumbricals
Affected Nerve (Root) Ulnar nerve (C7, C8, Tl;
pisohamate canal)
Muscle Weakness in
Flexor digiti minimi Abductor digiti minimi Opponens digiti minimi Adductor pollicis Interossei Medial two lumbricals Palmaris brevis
Affected Nerve (Root) L1 Muscle Weakness in
None
Affected Nerve (Root) L2 Muscle Weakness in
Psoas, hip adductors
Affected Nerve (Root) L3 Muscle Weakness in
Psoas, quadriceps-thigh wasting
Affected Nerve (Root) L4 Muscle Weakness in
Tibialis anterior, extensor hallucis
Affected Nerve (Root) L5 Muscle Weakness in
Extensor hallucis, peroneals, gluteus medius, ankle dorsiflexors, hamstrings-calf wasting
Affected Nerve (Root) S1 Muscle Weakness in
Calf and hamstrings, wasting of gluteals, peroneals, plantar flexors
Affected Nerve (Root) S2 Muscle Weakness in
Calf and hamstrings, wasting of gluteals, plantar flexors
Affected Nerve (Root) S3 Muscle Weakness in
None
Affected Nerve (Root) S4 Muscle Weakness in
Bladder, rectum
