Orgins And Insertions AP I Flashcards
Pec Major
O: clavicle, Sternum, Costal cartilages of ribs 2-7
I: Intertubercular Sulcus/ groove of humerus
A: adducts and medially rotates humerus at shoulder joint
N: median and lateral pectoral nerves
Pec Minor
O: Ribs 3-5
I: Coracoid Process
A: Abducts/protracts scapula and rotates it downwards
Elevates ribs during forced inhalation when the scapula is fixed
Serratus anterior
O: superior 9 ribs
I: vertebral border and inf. Angle of the scapula
A: Abducts scapula and rotates in upward, elevates ribs when the scapula is fixed
N: Long thoracic nerve
What muscle is called the boxers muscle
Serratus anterior
Subclavis Muscle
O: first rib
I: clavicle
A: depresses clavicle and moves in anteriorly. Stabilizes the pec girdle
N: Subclavian nerve
Trapezius
O: Occipital protuberance, sup. Nuchal line, nuchal ligament, and spinous process of C7-T12
I: Clavicle, acromion, and spine of scapula
A: superior fibers elevate scapula and extend head, middle fibers adductor/retract scapula, inferior fibers depress scapula
N: CN XI
Latissimus Dorsi
O: Spinous process of inferior 6 thoracic vertebra, lumbar vert. T7-L5 crests of sacrum and ilium.
I: Intertubecular sulcus of humerus
A: Extends, adducts , and medially rotates humerus at shoulder joint, draws arm inf. And post., raises body toward arms during climbing
N: thoracodorsal nerve
Levator Scapulae
O: Sup. 5 cervical vert.
I: Superior vertebral border of scapula
A: Elevates scapula
N: Dorsal scapular nerve
Rhomboid Major
O: spinous processes of thoracic vertebrae T2-T5
I: medial border of scapula inf. To the scapular spine
A: elevates and adducts scapula, stabilizes scapula
N: dorsal scapular nerve
Rhomboid Minor
O: Spinous processes of C7 and T1
I: medial border of scapula superior to the scapular spine
A: elevates and adducts scapula, stabilizes scapula
N: dorsal scapular nerve
Deltoid
O: Acromial extremity of clavicle, acromion, and spine of scapula
I: deltoid tuberosity of humerus
A: entire muscle abducts arm at shoulder joint, anterior fibers flex and medially rotate arm, posterior fibers extend and laterally rotate arm
N: axillary nerve
Supraspinatus
O: supraspinous fossa of scapula
I: greater tubercle of humerus
A: assists deltoid with initial stages of addicting arm at shoulder joint. Continues to act throughout abduction
N: suprascapular nerve
Infraspinatus
O: infraspinatus fossa of scapula
I: greater tubercle of humerus
A: laterally rotates arm at shoulder joint
N: suprascapular nerve
Teres Minor
O: middle lateral border of scapula
I: greater tubercle of humerus
A: laterally rotates and adducts arm at shoulder joint
N: Axillary Nerve
Teres Major
O: inferior Lateral border of scapula
I: intertubecular sulcus of humerus
A: adducts, medially rotates, and extends arm at shoulder joint
N: lower scapular nerve
Subscapularis
O: subscapular fossa of scapula
I: lesser tubercle of humerus
A: medially rotates arm at shoulder joint
N: upper and lower subscapular nerves
Dorsal Interossei
O: adjacent sides of two metacarpals (Bipennate muscles) I: digits 2-3-4 A: abducts digits, extends fingers (Acts with limbricals) N: ulnar nerve
Palmar Inerossei
O: palmar surfaces of metacarpals I: digits 2-4-5 A: abducts and flexes fingers (Acting with lumbricals) N: ulnar nerve
Lumbricals
O: distal portion of flexor digitorum profundus tendons
I: distal portion of extensor digitorum tendons
A: flexes and extends finger
N: median and ulnar nerves
Opponens Digiti Minimi
O: flexor retinaculum and hamate
I: medial 5th metacarpal
A: draws 5th metacarpal anteriorly, bringing 5th digits into opposition with the thumb
N: ulnar nerve
Flexor Digiti Minimi Brevísimo
O: flexor retinaculum and hamate
I: medial side of proximal phalanx of little finger
A: flexes 5th digit
N: Ulnar nerve
Abductor Digiti Minimi
O: pisiform
I: medial side of proximal phalanx of little finger
A: abducts and flexes 5th digit
N: ulnar nerve
Adductor Pollicis
O: anterior palmar side of 2nd and 3rd metacarpals
I: medial side of proximal phalanx of thumb
A: draws 1st metacarpal medically toward center of palm
(Adducts thumb)
N: ulnar nerve
Flexor pollicis brevis
O: flexor retinaculum, scaphoid, and trapezium
I: lateral side of proximal phalanx of thumb
A: flexes thumb
N: median and ulnar nerves
Opponens Pollicis
O: flexor retinaculum, scaphoid, and trapezium
I: lateral 1st metacarpal
A: draws 1st metacarpal medially to oppose little finger toward center of palm
N: median nerve
Abductor Pollicis Brevis
O: flexor retinaculum, scaphoid, and trapezium
I: Lateral side of proximal phalanx of thumb
A: ABDUCTS thumb (helps oppose it)
N: median nerve
Supinator
O: humerus (Lateral epicondyle) and Proximal Ulna
I: proximal radius
A: supinate forearm
N: radial nerve
Pronator quadratus
O: distal ulna
I: distal radius
A: pronates forearm
N: median nerve
Pronator teres
O: medial epicondoyle of humerus
I: radius
A: pronates forearm
N: median Nerve
Extensor Indicis
O: ulna
I: index finger
A: extends 2ns digit
N: radial nerve
Extensor Pollicis Longus
O: posterior ulna
I: distal phalanx of thumb
A: extends thumb
N: radial nerve
Extensor pollicis brevis
O: post. Radius
I: proximal phalanx of thumb
A: extends thumb
N: radial nerve
Abductor pollicis longus
O: posterior radius and ulna
I:base of thumb
A: abducts and extends thumb
N: radial nerve
Extensor Carpi Ulnaris
O: lateral epicondyle
I: posterior base of 5th metacarpal
A: (ulnar deviation)
N: radial
Extensor digit Minimi
O: lateral epicondyle
I: posterior phalanx of little finger
A: extends 5th digit
N: radial nerve
Extensor digitorum
O: lateral epicondyle
I: posterior phalanges of digits 2-5
A: extends digits 2-5
N: radial nerve
Extensor Carpi Radialis Brevis
O: lateral epicondyle of humerus
I: posterior 3rd metacarpal
A: radial deviation
N: radial
Extensor carpi radialis longus
O: distal humerus
I: posterior of 2nd metacarpal
A: radial deviation
N: radial
Brachioradialis
O: humerus
I: radius
A: pronator and supinator
N: radial nerve
Flexor digitorum profundus
O: ulna
I: anterior digits of 2-5
A: flexes fingers and and flexion of the hand
N: median AND ulnar nerve
Flexor pollicis longus
O: radius
I: distal phalanx of thumb
A: flexes thumb
N: median nerve
Flexor digitorum superficialis
O: medial epicondyle of humerus
I: anterior phalanges of digits 2-5
A: flexes fingers and hand at the wrist
N: median nerve
Flexor Carpi Ulnaris
O: Humeral head- medial epicondyle
Ulnar head- olecranon and posterior border of ulna
I: anterior carpals (pisiform, hamate) and base of 5th metacarpal
A: ulnar deviation
N: ulnar nerve
Palmaris Longus
O: medial epicondyle
I: flexor retinaculum and palmar aponeurosis
A: flexes hand at wrist and tightens palmar aponeurosis
N: median nerve
Flexor Carpi Radialis
O: median epicondyle
I: anterior hand and 2nd and 3rd metacarpals
A: Radial deviation
N: median nerve
Anoconeus
O: lateral epicondyle
I: olecarnon
A: assists in extending the forearm (stabilizing)
N: radial nerve
Triceps Brachii
O: long head- infraglenoid tubercle Lateral head and medial head- humerus I: olecranon of ulna A: extends foreman and extends arm at shoulder N: radial
Coracobrachialis
O: coracoid
I: humerus
A: flexes and adducts arm at shoulder joint
N: musculocutaneous nerve
Brachialis
O: humerus
I: ulnar tuberosity and coronoid process of ulna
A: flexes forearm at elbow joint
N: musculotaneous nerve
Biceps Brachii
O: long head- Supraglenoid tubercle of scapula
Short head- coracoid process
I: tuberosity of radius and bici-Italia aponeurosis
A: flexes are at elbow, supinator forearm, and flexes arm at shoulder joint
N: musculocutaneous
