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MUSCLES
Origin, Insertion, & Action
| Question | Answer |
|---|---|
| Where does the SERRATUS ANTERIOR muscle originate? | Upper 8 or 9 ribs |
| Where does the SERRATUS ANTERIOR muscle insert? | 1)Anterior surface of vertebral border of scapula 2)Inferior angle of scapula |
| Action(s) of the SERRATUS ANTERIOR muscle: | 1)Scapular protraction 2)Upward rotation |
| Where does the PECTORALIS MINOR muscle originate? | Ribs 3, 4, & 5 near the costal cartilage |
| Where does the PECTORALIS MINOR muscle insert? | Coracoid process of scapula |
| Action(s) of the PECTORALIS MINOR muscle: | 1)Depress scapula 2)Downward rotation of scapula 3)Elevates ribs |
| Where does the STERNOCLEIDOMASTOID muscle originate? | 1)Superior border of anterior surface of medial calvicle 2)Manubrium of sternum |
| Where does the STERNOCLEIDOMASTOID muscle insert? | 1)Mastoid process of temporal bone 2)Superior nuchal line of occipital bone |
| Action(s) of the STERNOCLEIDOMASTOID muscle: | 1)Head rotation 2)Lateral bending of head |
| Where does the TRAPEZIUS muscle originate? | 1)External occipital protuberance 2)Nuchal line of occipital bone 3)Spinous process of C6-T12 |
| Where does the TRAPEZIUS muscle insert? | 1)Spine of scapula 2)Acromion process 3)Distal clavicle |
| Action(s) of the TRAPEZIUS muscle: | 1)Upper: Elevate & upward rotation of scapula 2)Middle: Scapular retraction 3)Lower: Upward rotation of scapula; Depression of scapula; Braces shoulder |
| Where does the RHOMBOID MAJOR muscle originate? | Spinous process of T1-T5 |
| Where does the RHOMBOID MAJOR muscle insert? | Vertebral border of scapula from root of the spine to apex |
| Action(s) of the RHOMBOID MAJOR muscle: | Retraction and elevation of scapula |
| Where does the RHOMBOID MINOR muscle originate? | Spinous process of C7-T1 |
| Where does the RHOMBOID MINOR muscle insert? | Vertebral border of scapula at root of spine |
| Action(s) of the RHOMBOID MINOR muscle: | Retraction and elevation of scapula |
| Where does the LEVATOR SCAPULAE muscle originate? | Transverse process of C1-C4 |
| Where does the LEVATOR SCPULAE muscle insert? | Superior angle of scapula |
| Action(s) of the LEVATOR SCAPULAE muscle: | Elevation and rotation of scapula |
| Where does the PECTORALIS MAJOR muscle originate? | 1)Sternum 2)Clavicle 3)Costal cartilage |
| Where does the PECTORALIS MAJOR muscle insert? | Greater tubercle of humerus |
| Action(s) of the PECTORALIS MAJOR muscle: | Adduction & medial rotation of humerus |
| Where does the CORACOBRACHIALIS muscle originate? | Coracoid process of scapula |
| Where does the CORACOBRACHIALIS muscle insert? | Medial humerus |
| Action(s) of the CORACOBRACHIALIS muscle: | Adduct and flex the humerus |
| Where does the DELTOID muscle originate? | 1)Distal clavicle 2)Acromion process 3)Spine of scapula |
| Where does the DELTOID muscle insert? | Deltoid tuberosity of humerus |
| Action(s) of the DELTOID muscle: | 1)Anterior-Flex humerus 2)Middle-Abduction of humerus 3)Posterior-Assists in full abduction of humerus |
| Where does the TERES MAJOR muscle originate? | Inferior angle of scapula |
| Where does the TERES MAJOR muscle insert? | Intertubercular groove of humerus |
| Action(s) of the TERES MAJOR muscle: | Extension and medial rotation of humerus |
| Where does the TERES MINOR muscle originate? | Axillary border of scapula |
| Where does the TERES MINOR muscle insert? | Greater tubercle of humerus |
| Action(s) of the TERES MINOR muscle: | 1)Extension and lateral rotation of humerus 2)Stabilizes shoulder |
| Where does the BICEPS BRACHII LONG HEAD muscle originate? | Supraglenoid tubercle of scapula |
| Where does the BICEPS BRACHII LONG HEAD muscle insert? | Radial tuberosity of radius |
| Action(s) of the BICEPS BRACHII LONG HEAD muscle: | Adduction of humerus |
| Where does the BICEPS BRACHII SHORT HEAD muscle originate? | Coracoid process of scapula |
| Where does the BICEPS BRACHII SHORT HEAD muscle insert? | Radial tuberosity of raidus |
| Action(s) of the BICEPS BRACHII SHORT HEAD muscle: | 1)Supination of forearm 2)Flexion of elbow |
| Where does the BRACHIALIS muscle originate? | Distal anterior surface of humerus |
| Where does the BRACHIALIS muscle insert? | Coronoid process of ulna |
| Action(s) of the BRACHIALIS muscle: | Flexion of elbow |
| Where does the BRACHIORADIALIS muscle originate? | Lateral supracondyle of humerus |
| Where does the BRACHIORADIALIS muscle insert? | Styloid process of radius |
| Action(s) of the BRACHIORADIALIS muscle: | 1)Flexion of elbow 2)Supination of forearm |
| Where does the TRICEPS BRACHII LONG HEAD muscle originate? | Infraglenoid tubercle of scapula |
| Where does the TRICEPS BRACHII LONG HEAD muscle insert? | Olecranon process of the ulna |
| Action(s) of the TRICEPS BRACHII LONG HEAD muscle: | 1)Adduction of humerus 2)Extension of elbow |
| Where does the TRICEPS BRACHII LATERAL HEAD muscle originate? | Posterior humerus |
| Where does the TRICEPS BRACHII LATERAL HEAD muscle insert? | Olecranon process of ulna |
| Action(s) of the TRICEPS BRACHII LATERAL HEAD muscle: | 1)Adduction of humerus 2)Extension of elbow |
| Where does the TRICEPS BRACHII MEDIAL HEAD muscle originate? | Posterior distal humerus |
| Where does the TRICEPS BRACHII MEDIAL HEAD muscle insert? | Olecranon process of ulna |
| Action(s) of the TRICEPS BRACHII MEDIAL HEAD muscle: | 1)Adduction of humerus 2)Extension of elbow |
| Where does the LATISSIMUS DORSI muscle originate? | 1)Spinous process of lower thoracic vertebrae 2)Lumbar & sacral vertebrae 3)Iliac crest 4)Lower 3-4 ribs |
| Where does the LATISSIMUS DORSI muscle insert? | Intertubercular groove of humerus |
| Action(s) of the LATISSIMUS DORSI muscle: | 1)Extension of humerus 2)Medial rotation of humerus 3)Adduction of humerus |
| Where does the SUPRASPINATUS muscle originate? | Medial 2/3 of supraspinous fossa of scapula |
| Where does the SUPRASPINATUS muscle insert? | Superior facet of the greater tubercle of humerus |
| Action(s) of the SUPRASPINATUS muscle: | Shoulder abduction |
| Where does the INFRASPINATUS muscle originate? | Medial 2/3 of the infraspinous fossa of scapula |
| Where does the INFRASPINATUS muscle insert? | Middle facet of greater tubercle of humerus |
| Action(s) of the INFRASPINATUS muscle: | Lateral rotation of shoulder |
| Where does the SUBSCAPULARIS muscle originate? | Subscapular fossa of scapula |
| Where does the SUBSCAPULARIS muscle insert? | Lesser tubercle of humerus |
| Action(s) of the SUBSCAPULARIS muscle: | 1)Medial rotation of humerus 2)Adduction of humerus |
| Where does the PALMARIS LONGUS muscle originate? | Medial epicondyle of humerus |
| Where does the PALMARIS LONGUS muscle insert? | 1)Palmar aponeurosis 2)Transverse carpal ligament |
| Action(s) of the PALMARIS LONGUS muscle: | 1)Flexion of wrist and forearm 2)Tenses palmar aponeurosis |
| Where does the FLEXOR CARPI ULNARIS muscle originate? | Medial epicondyle of humerus |
| Where does the FLEXOR CARPI ULNARIS muscle insert? | 1)Pisiform and hamate bone 2)Base of metacarpal 5 |
| Action(s) of the FLEXOR CARPI ULNARIS muscle: | Adduction and flexion of wrist |
| Where does the FLEXOR CARPI RADIALIS muscle originate? | Medial epicondyle of humerus |
| Where does the FLEXOR CARPI RADIALIS muscle insert? | 1)Base of metacarpal 2 2)Slip to metacarpal 3 |
| Action(s) of the FLEXOR CARPI RADIALIS muscle: | 1)Flexion of wrist and forearm 2)Abduction of wrist |
| Where does the FLEXOR DIGITORUM SUPERFICIALIS muscle originate? | 1)Medial epicondyle of humerus 2)Coronoid process of ulna 3)Oblique line of radius |
| Where does the FLEXOR DIGITORUM SUPERFICIALIS muscle insert? | Middle phalanx of 4 fingers |
| Action(s) of the FLEXOR DIGITORUM SUPERFICIALIS muscle: | 1)Flexion of 2nd phalanges of 4 fingers 2)Flexion of wrist and elbow |
| Where does the FLEXOR DIGITORUM PROFUNDUS muscle originate? | 1)Proximal shaft of ulna 2)Coronoid process of ulna |
| Where does the FLEXOR DIGITORUM PROFUNDUS muscle insert? | Distal phalanx of 4 fingers |
| Action(s) of the FLEXOR DIGITORUM PROFUNDUS muscle: | 1)Flexion of all phalanges of 4 fingers 2)Flexion of wrist |
| Where does the FLEXOR POLLICIS LONGUS muscle originate? | 1)Medial epicondyle of humerus 2)Coronoid process of ulna 3)Anterior radius |
| Where does the FLEXOR POLLICIS LONGUS muscle insert? | Distal phalanx of thumb |
| Action of the FLEXOR POLLICIS LONGUS muscle: | 1)Flexion of thumb 2)Flexion & adduction of 1st metacarpal |
| Where does the PRONATOR TERES muscle originate? | 1)Medial epicondyle of humerus 2)Coronoid process of ulna |
| Where does the PRONATOR TERES muscle insert? | Proximal & middle radius |
| Action(s) of the PRONATOR TERES muscle: | Pronate hand |
| Where does the PRONATOR QUADRATUS muscle originate? | Anterior distal ulna |
| Where does the PRONATOR QUADRATUS muscle insert? | Anterior distal 1/4 of radius |
| Action(s) of the PRONATOR QUADRATUS muscle: | Pronate hand |
| Where does the EXTENSOR CARPI RADIALIS LONGUS muscle originate? | Lateral supracondyle of humerus |
| Where does the EXTENSOR CARPI RADIALIS LONGUS muscle insert? | Base of metacarpal 2 |
| Action(s) of the EXTENSOR CARPI RADIALIS LONGUS muscle: | Abduction and extension of wrist |
| Where does the EXTENSOR CARPI RADIALIS BREVIS muscle insert? | Metacarpal 3 |
| Action(s) of the EXTENSOR CARPI RADIALIS BREVIS muscle: | Abduction and extension of wrist |
| Where does the EXTENSOR CARPI ULNARIS muscle originate? | 1)Lateral epicondyle of humerus 2)Anterior proximal ulna |
| Where does the EXTENSOR CARPI ULNARIS muscle insert? | Metacarpal 5 |
| Action(s) of the EXTENSOR CARPI ULNARIS muscle: | Adduction and extension of wrist |
| Where does the EXTENSOR DIGITORUM muscle originate? | Lateral epicondyle of humerus |
| Where does the EXTENSOR DIGITORUM muscle insert? | Middle & distal phalanges of 4 fingers |
| Action(s) of the EXTENSOR DIGITORUM muscle: | Extension of digits and wrist |
| Where does the EXTENSOR DIGITI MINIMI muscle originate? | Lateral epicondyle of humerus |
| Where does the EXTENSOR DIGITI MINIMI muscle insert? | Posterior proximal of phalanx 5 |
| Action(s) of the EXTENSOR DIGITI MINIMI muscle: | Extension of the little finger |
| Where does the EXTENSOR CARPI RADIALIS BREVIS muscle originate? | Lateral epicondyle of humerus |
| Where does the EXTENSOR INDICIS muscle originate? | 1)Distal ulna 2)Interosseous membrane |
| Where does the EXTENSOR INDICIS muscle insert? | Tendon of extensor digitorum to index finger |
| Action(s) of the EXTENSOR INDICIS muscle: | Extension of index finger |
| Where does the ABDUCTOR POLLICIS LONGUS muscle originate? | 1)Middle ulna 2)Radius 3)Interosseous membrane |
| Where does the ABDUCTOR POLLICIS LONGUS muscle insert? | Proximal metacarpal 1 |
| Action(s) of the ABDUCTOR POLLICIS LONGUS muscle: | Abduction of thumb and hand |
| Where does the EXTENSOR POLLICIS LONGUS muscle originate? | Distal posterior ulna |
| Where does the EXTENSOR POLLICIS LONGUS muscle insert? | Base of distal phalanx of thumb |
| Action(s) of the EXTENSOR POLLICIS LONGUS muscle: | 1)Abduction of wrist 2)Extension of thumb |
| Where does the EXTENSOR POLLICIS BREVIS muscle originate? | 1)Distal radius 2)Interosseous membrane |
| Where does the EXTENSOR POLLICIS BREVIS muscle insert? | Proximal phalanx of thumb |
| Action(s) of the EXTENSOR POLLICIS BREVIS muscle: | 1)Extension thumb 2)Abduction of hand |
| Where does the TENSOR FASCIA LATA muscle originate? | Anterior crest of ilium |
| Where does the TENSOR FASCIA LATA muscle insert? | Iliotibial band |
| Action(s) of the TENSOR FASCIA LATA muscle: | 1) Tenses fascia lata 2)Abduction, medial rotation, & flexion of hip |
| Where does the RECTUS FEMORIS muscle originate? | 1)Anterior inferior spine of ilium 2)Posterior brim of acetabulum |
| Where does the RECTUS FEMORIS muscle insert? | 1)Proximal border of patella 2)Via patellar ligament to the tibial tuberosity |
| Action(s) of the RECTUS FEMORIS muscle: | 1)Extension of leg at knee 2)Flexion of hip |
| Where does the VASTUS LATERALIS muscle originate? | Linea aspera |
| Where does the VASTUS LATERALIS muscle insert? | Lateral border of patella |
| Action(s) of the VASTUS LATERALIS muscle: | Extension of leg at knee |
| Where does the VASTUS MEDIALIS muscle originate? | Linea Aspera |
| Where does the VASTUS MEDIALIS muscle insert? | Medial border of patella |
| Action(s) of the VASTUS MEDIALIS muscle: | Extention of leg at knee |
| Where does the VASTUS INTERMEDIUS muscle originate? | Anterior & lateral surface of proximal femus |
| Where does the VASTUS INTERMEDIUS muscle insert? | Proximal border of patella |
| Action(s) of the VASTUS INTERMEDIUS muscle: | Extension of leg at knee |
| Where does the SARTORIUS muscle originate? | Anterior superior spine of ilium |
| Where does the SARTORIUS muscle insert? | Pes anserine |
| Action(s) of the SARTORIUS muscle: | 1)Flexion of knee 2)Flexion & abduction of hip 3)Lateral rotation of femur |
| Where does the GRACILIS muscle originate? | Ischiopubic ramus |
| Where does the GRACILIS muscle insert? | Pes anserine |
| Action(s) of the GRACILIS muscle: | 1)Adduction of hip 2)medial rotation of femur 3)Flexion of knee |
| Where does the BICEPS FEMORIS LONG HEAD muscle originate? | Ischial tuberosity |
| Where does the BICEPS FEMORIS LONG HEAD muscle insert? | Lateral head of fibula |
| Action(s) of the BICEPS FEMORIS LONG HEAD muscle: | Flexion of knee |
| Where does the BICEPS FEMORIS SHORT HEAD muscle originate? | Linea aspera |
| Where does the BICEPS FEMORIS SHORT HEAD muscle insert? | Lateral head of fibula |
| Action(s) of the BICEPS FEMORIS SHORT HEAD muscle: | Extension of femur |
| Where does the SEMIMEMBRANOSUS muscle originate? | Ischial tuberosity |
| Where does the SEMIMEMBRANOSUS muscle insert? | Medial proximal tibia |
| Action(s) of the SEMIMEMBRANOSUS muscle: | 1)Flexion of knee 2)Extension of hip |
| Where does the SEMITENDINOSUS muscle originate? | Ischial tuberosity |
| Where does the SEMITENDINOSUS muscle insert? | Pes anserine |
| Action(s) of the SEMITENDINOSUS muscle: | 1)Flexion of knee 2)Extension of hip |
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ANATOMY328
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