Muscles of Appendicular Skeleton Flashcards
Teres major
- Action: Extend, rotate, adduct humerus
- Origin: Posterior & inferior angle of scapula
- Insertion: Intertubercle sulcus of humerus
Flexor Carpi Radialis
- Action: Flexor of wrist
- Origin: Medial epicondyle of humerus
- Insertion: Palmer aponeurosis
Gluteus minimus
- Action: Abduct & medially rotate thigh
- Origin: Inferior surface of ilium
- Insertion: Greater trochanter of femur
Extensor carpi radialis
Brevis & longus
- Action: Extend & abduct wrist
- Origin: Lateral epicondyle of humerus
- Insertion: Base of metacarpals 2 and 3
Trapezius
- Action: Extends head, moves scapula
- Origin: Occiput, spinous process of C7-T12
- Insertion: Scapular spine & acromion process, lateral clavicle
Coracobrachialis
- Action: Adduction & flexion of shoulder
- Origin: Coracoid process
- Insertion: Shaft of humerus
Piriformis
- Action: Lateral rotation & abduction of hip
- Origin: Sacrum
- Insertion: Greater trochanger of femur
Pectoralis minor
- Action: Draws scapula forward
- Origin: Anterior surface of ribs 3-5
- Insertion: Coracoid process of scapula
Palmaris longus
- Action: Flexor of wrist
- Origin: Medial epicondyle of humerus
- Insertion: Palmar aponeurosis
Supraspinatus
- Action: Abduct humerus
- Origin: Supraspinous fossa
- Insertion: Greater tubercle of humerus
Piriformis
- Action: Lateral rotation & abduction of hip
- Origin: Sacrum
- Insertion: Greater trochanger of femur
Palmaris longus
- Action: Flexor of wrist
- Origin: Medial epicondyle of humerus
- Insertion: Palmar aponeurosis
Flexor carpi
- Action: Flexion & adduction of wrist
- Origin: Medial epicondyle of humerus & olecranon of ulna
- Insertion: Pisiform, hamate, and 5th metacarpal
Teres minor
- Action: Rotate humerus
- Origin: Lateral margin of scapula
- Insertion: Greater tubercle of humerus
Deltoid
- Action: Adduct humerus
- Origin: Clavicle, acromion & spine of scapula
- Insertion: Deltoid tuberosity
Infraspinatus
- Action: Rotate humerus
- Origin: Infraspinous fossa
- Insertion: Greater tubercle of humerus
Flexor Carpi Radialis
- Action: Flexor of wrist
- Origin: Medial epicondyle of humerus
- Insertion: Palmer aponeurosis
Biceps brachii
- Action: Flexion of elbow & supination of forearm
- Origin: Coracoid process, glenoid cavity, intertubercle sulcus
- Insertion: Radial tuberosity
Coracobrachialis
- Action: Adduction & flexion of shoulder
- Origin: Coracoid process
- Insertion: Shaft of humerus
Coracobrachialis
- Action: Adduction & flexion of shoulder
- Origin: Coracoid process
- Insertion: Shaft of humerus
Subscapularis
- Action: Rotate humerus
- Origin: Subscapular fossa
- Insertion: Lesser tubercle of humerus
Gluteus minimus
- Action: Abduct & medially rotate thigh
- Origin: Inferior surface of ilium
- Insertion: Greater trochanter of femur
Tibialis posterior
Action: Inversion, plantar flexion
Origin: Superior tibia & fibula
Insertion: Tarsals & metatarsals 2-4
Deltoid
- Action: Adduct humerus
- Origin: Clavicle, acromion & spine of scapula
- Insertion: Deltoid tuberosity
Coracobrachialis
- Action: Adduction & flexion of shoulder
- Origin: Coracoid process
- Insertion: Shaft of humerus
Brachioradialis
- Action: Synergist of elbow flexion
- Origin: Distal humerus
- Insertion: Styloid process of radius
Tibialis posterior
- Action: Inversion, plantar flexion
- Origin: Superior tibia & fibula
- Insertion: Tarsals & metatarsals 2-4
Teres major
- Action: Extend, rotate, adduct humerus
- Origin: Posterior & inferior angle of scapula
- Insertion: Intertubercle sulcus of humerus
Pectoralis major
- Action: Flexes & adducts arm
- Origin: Clavicle, sternum, ribs 1-6
- Insertion: Intertubercle sulcus of humerus
Popliteus
- Action: Medial flexion & rotate knee
- Origin: Lateral condyle of femur
- Insertion: Proximal tibia
Latissimus doris
- Action: Extend, abduct, & rotate arm
- Origin: Spinous process T6-L5
- Insertion: Intertubercle sulcus of humerus
Extensor carpi ulnaris
- Action: Extend & adduct wrist
- Origin: Lateral epicondyle of humerus
- Insertion: Base of metacarpal 5
Palmaris longus
- Action: Flexor of wrist
- Origin: Medial epicondyle of humerus
- Insertion: Palmar aponeurosis
Extensor carpi radialis
Brevis & longus
- Action: Extend & abduct wrist
- Origin: Lateral epicondyle of humerus
- Insertion: Base of metacarpals 2 and 3
Gluteus medius
- Action: Abduct & medially rotate thigh
- Origin: Upper surface ilium
- Insertion: Greater trochanter of femur
Triceps brachii
- Action: Forearm extension
- Origin: Glenoid cavity, radial groove of humerus
- Insertion: Olecranon process of ulna
Latissimus doris
- Action: Extend, abduct, & rotate arm
- Origin: Spinous process T6-L5
- Insertion: Intertubercle sulcus of humerus
Extensor digitorum
- Action: Finger extension
- Origin: Lateral epicondyle of humerus
- Insertion: Distal phalanges 2-5
Subscapularis
- Action: Rotate humerus
- Origin: Subscapular fossa
- Insertion: Lesser tubercle of humerus
Infraspinatus
- Action: Rotate humerus
- Origin: Infraspinous fossa
- Insertion: Greater tubercle of humerus
Popliteus
- Action: Medial flexion & rotate knee
- Origin: Lateral condyle of femur
- Insertion: Proximal tibia
Trapezius
- Action: Extends head, moves scapula
- Origin: Occiput, spinous process of C7-T12
- Insertion: Scapular spine & acromion process, lateral clavicle
Flexor carpi
- Action: Flexion & adduction of wrist
- Origin: Medial epicondyle of humerus & olecranon of ulna
- Insertion: Pisiform, hamate, and 5th metacarpal
Pectoralis major
- Action: Flexes & adducts arm
- Origin: Clavicle, sternum, ribs 1-6
- Insertion: Intertubercle sulcus of humerus
Brachialis
- Action: Flexor of elbow
- Origin: Distal anterior of humerus
- Insertion: Coronoid process
Rhomboids
- Action: Pulls scapula medially
- Origin: Spinous processes of C7-T3
- Insertion: Medial border of scapula
Teres minor
- Action: Rotate humerus
- Origin: Lateral margin of scapula
- Insertion: Greater tubercle of humerus
Triceps brachii
- Action: Forearm extension
- Origin: Glenoid cavity, radial groove of humerus
- Insertion: Olecranon process of ulna
Gluteus medius
- Action: Abduct & medially rotate thigh
- Origin: Upper surface ilium
- Insertion: Greater trochanter of femur
Extensor carpi ulnaris
- Action: Extend & adduct wrist
- Origin: Lateral epicondyle of humerus
- Insertion: Base of metacarpal 5