Upper Body Muscles Actions and Nerve Flashcards
Sternoclediomastoid
Action
Bilaterally: flex neck
Unilaterally: laterally flex and rotate head to side opposite contracting muscle
Nerve: Spinal Accessory
Scalenes
Action
Bilaterally: flex neck
Unilaterally: laterally flex and rotate head to side opposite contracting muscle
Nerve: C3-C5 nerve roots
Pectoralis Major
Action
Adducts and IR shoulder
Clavicular Head: Shoulder Flexion (IR)
Horizontal Adduction
Nerve: lateral pectoral nerve
Sternocostal head: Shoulder adduction-oblique
nerve: medial and lateral pectoral nerve
Rhomboids
Action:
scapular retraction
Scapular elevation
nerve: dorsal scapular
Serratus Anterior
Action: Scapular protraction
scapular elevation
Nerve: Long thoracic
Upper Traps
Action: Cervical extension (B)
Scapular elevation (B)
Cervical lateral flexion
Cervical opposite rotation
Nerve: Spinal Accessory
Middle Traps
Action: Scapular retraction
Nerve: Spinal accessory
Lower Traps
Action: Scapular retraction
Scapular depression
Nerve : Spinal Accessory
Deltoid
Action:
Anterior: flexes and IR
Middle: Abduction
Posterior: Extends and ER
Nerve: Axillary
Supraspinatus
Abduction
Stabilizie humeral head
nerve: suprascapular
Infraspinatus
Action: ER
Nerve: Suprascapular
Teres Minor
Action: ER
Nerve: Axillary
Subscapularis
Action: Adduction and IR
Nerve: Upper and Lower Subscapular
Teres major
Extension, adduction, IR
nerve: lower subscapular
Lats Dorsi
Extends, Adducts, IR
nerve: thoracodorsal
Biceps Brachii
Action: Shoulder Flexion Elbow flexion (supination)
Nerve: musculocutaneous
Coracobracialis
Action: Shoulder flexion
Shoulder adduction
Nerve: Musculocutaneous
Triceps
Extends forearm, assist in shoulder and elbow extension
Nerve: radial
Brachioradialis
Elbow Flexion (neutral)
Nerve: Radial
Bracialis
Elbow flexion (pronation)
Nerve: Musculocutaneous
Supinator
Forearm Supination
Nerve: Radial
Pronator teres
Forearm pronation
Elbow Flexion
Nerve: Median
Pronator Quadratus
Forearm pronation
Nerve: median
Flexor Capri Ulnaris
Wrist flexion
wrist ulnar devation
weak elbow flexion
Nerve: ulnar
Flexor Carpi Radialis
wrist flexion
wirst radial devation
weak elbow flexion
Nerve: median
Palmaris Longus
Wrist flexion
Weak elbow flexion
Nerve: median
Extensor Carpi Ulnaris
wrist extension
wirst ulnar devation
Nerve: radial
extensor carpi radialis longus
wrist extension
wrist radial deviation
weak elbow flexion
nerve: radial
extensor carpi radialis brevis
wrist extension
wrist radial deivation
nerve: radial
Extensor Indicis
2nd MCP/IP extension
nerve: radial
Extensor Digiti Minimi
5th MCP/IP extension
Nerve: radial
Palmar Interossei
MCP addcution
MCP flexion
IP extension
Nerve: ulnar
Dorsal Interossei
MCP abduction
MCP flexion
IP extension
Nerve: Ulnar
Lumbaricals
MCP flexion
IP extension
Nerve: Ulnar/median
Flexor Digitorum Superificalis
PIP flexion
MCP flexion
weak wrist flexion
nerve: median
Flexor Digitorum Profundus
DIP flexion
MCP flexion
weak wrist flexion
Nerve: Ulnar/ Median
Psoas Major
Hip flexion
nerve: femoral
Psoas Minor
Trunk flexion
Nerve: Lumbar Plexus
Iliacus
Hip flexion
Nerve: femoral
TFL
Hip abduction
Hip IR
Hip flexion
Nerve: Superior Gluteal
Glut Max
Hip Extension/ ER
(with knee flexed)
Nerve: Inferior Gluteal
Glut Med
Hip abdution
Hip IR
nerve: Superior Gluteal
Glut Min
Hip abduction
Hip IR
Hip flexion
nerve: Superior Gluteal
Rectus Abdominis
Trunk flexion
Nerve: thorcodorsal
Transverse Abdominis
Trunk Stabilization
Nerve: thoracodorsal
External Oblique
Trunk Flexion
Trunk rotation (opposite)
Trunk lateral flexion (same)
Internal Oblique
trunk flexion
trunk rotation (same)
trunk lateral flexion (same)