OINAs Flashcards
Serratus Posterior Superior
O: Ligamentum nuchae, spinous processes of C7, T1-T3
I: Ribs 1-4 lateral to the angle
A: Elevates the upper ribs during inhalation
IN: Ventral primary rami of spinal nerves T1-T4
Serratus Posterior Inferior
O: Thoracolumbar fascia, spinous processes of T11-T12 and L1-L2
I: Ribs 9-12 lateral to the angle
A: Pulls down the lower ribs during exhalation
IN: Ventral primary rami of spinal nerves T9-T12
Longissimus
O: Transverse processes of the inferior vertebrae
I: Transverse processes of superior vertebrae and mastoid process
A: Extends the head, trunk, and neck. Laterally side bends trunk, neck, and head
IN: Dorsal primary rami of C1-S1
Iliocostalis
O: Iliac crest and sacrum
I: Angles of the ribs
A: Extends and laterally bends the trunk
IN: Dorsal primary rami of spinal nerves C4-S5
Spinalis
O: Spinous processes at inferior vertebral levels
I: Spinous processes at superior vertebral levels and base of the skull
A: Extends and laterally bends the head, neck, and trunk
IN: Dorsal primary rami of spinal nerves C2-L3
Multifidus
O: Sacrum, transverse processes of C3-L5
I: Spinous processes 2-4 vertebral levels above the origin
A: Extend, laterally side bend, and contralaterally rotate the neck and trunk
IN: Dorsal primary rami C1-L5
Semispinalis
O: Transverse processes of T7-T12
I: Capitis: back of the skull between the nuchal lines
Cervicis and Thoracis: Spinous processes 4-6 vertebrae above origin
A: Extends, side bends, and contralaterally rotates the trunk
IN: Dorsal primary rami of C1-T12
Brachialis
O: Anterior surface of the lower one-half of the humerus and the associated intermuscular septa
I: Coronoid process of the ulna
A: Flexes the forearm
IN: Musculocutaneous nerve (C5,C6)
Brachioradialis
O: Upper two-thirds of the lateral supracondylar ridge of the humerus
I: Lateral side of the base of the styloid process of the radius
A: Flexes the elbow, assists in pronation and supination
IN: Radial nerve
Pronator Teres
O: Common flexor tendon and (deep or ulnar head) from medial side of coronoid process of the ulna
I: Midpoint of the lateral side of the shaft of the radius
A: Pronates the forearm
IN: Median nerve
Triceps Brachii
O: long head - infraglenoid tubercle of the scapula
Lateral head - posterolateral humerus and lateral intermuscular septum
Medial head - posteromedial surface of the inferior 1/2 of the humerus
I: Olecranon process of the ulna
A: Extends the forearm; the long head extends and adducts the arm
IN: Radial nerve
Anconeus
O: Lateral epicondyle of the humerus
I: Lateral side of the olecranon and the upper one-fourth of the ulna
A: Extends the forearm
IN: Nerve to anconeus, from the radial nerve
Supinator
O: Lateral epicondyle of the humerus, supinator crest and fossa of the ulna, radial collateral ligament, annular ligament
I: Lateral side of proximal one-third of radius
A: Supinates the forearm
IN: Deep radial nerve
Biceps Brachii
O: short head - tip of the coracoid process of the scapula
Long head - supraglenoid tubercle of the scapula
I: tuberosity of the radius
A: Flexes the forearm, flexes the arm (long head), supinates
IN: Musculocutaneous nerve (C5,C6)
Pronator Quadratus
O: Medial side of the anterior surface of the distal one-fourth of the ulna
I: Anterior surface of the distal one-fourth of the radius
A: Pronates the forearm
IN: Median nerve via the anterior interosseous nerve
Trapezius
O: medial third of the superior nuchal line, external occipital protuberance, ligamentum nuchae, spinous process of C7-T12
I: lateral third of the clavicle, the medial side of the acromion, the upper crest of the scapular spine, and the tubercle of the scapular spine
A: Upper - elevation of the scapula
Middle - retraction of the scapula
Lower - depression of the scapula and superior rotation
IN: Motor - spinal accessory nerve (CN XI)
Proprioception - C3-C4
Rhomboid Major
O: Spinous processes of T2-T5
I: Medial border of the scapula inferior to the spine of the scapula
A: Retracts, elevates, and inferiorly rotates the scapula
IN: Dorsal scapular nerve (C5)
Rhomboid Minor
O: Inferior portion of the ligamentum nuchae, and spinous processes of C7 and T1
I: Medial border of the scapula at the root of the spine of the scapula
A: Retracts, elevates, and inferiorly rotates the scapula
IN: Dorsal scapular nerve (C5)
Latissimus Dorsi
O: Spinous processes of T7 to the sacrum, lower 3 or 4 ribs, posterior third of the iliac crest, and sometimes from the inferior angle of the scapula
I: Floor of the intertubercular groove of the humerus
A: Internally rotates, extends, and adducts the arm
IN: Thoracodorsal nerve (C7,8) from the posterior cord of the brachial plexus
Levator Scapulae
O: Transverse processes of C1-C4
I: Medial border of the scapula from the superior angle of the scapula
A: Elevates the scapula
IN: Dorsal scapular nerve (C5), upper part of the muscle receives branches of C3 and C4
Flexor Carpi Radialis
O: Common flexor tendon from the medial epicondyle of the humerus
I: Base of the second and third metacarpals
A: Flexes the wrist, abducts the hand
IN: Median nerve
Palmaris Longus
O: Common flexor tendon, from the medial epicondyle of the humerus
I: Palmar aponeurosis
A: Flexes the wrist
IN: Median nerve
Flexor Carpi Ulnaris
O: Common flexor tendon and (ulnar head) from medial border of olecranon and upper 2/3 of the posterior border of the ulna
I: Pisiform, hook of hamate, and base of 5th metacarpal
A: Flexes the wrist, adducts the hand
IN: ulnar nerve
Flexor Digitorum Profundus
O: posterior border of the ulna, proximal two-thirds of medial border of ulna, interosseous membrane
I: base of the distal phalanx of digits 2-5
A: Flexes the metacarpophalangeal proximal interphalangeal and distal interphalangeal joints
IN: Median nerve (radial one-half); ulnar nerve (ulnar one-half)
Extensor Carpi Radialis Longus
O: lower one-third of the lateral supracondylar ridge of the humerus
I: Dorsum of the second metacarpal bone (base)
A: Extends the wrist; abducts the hand
IN: Radial nerve
Extensor Carpi Radialis Brevis
O: Common extensor tendon (lateral epidcondyle of humerus)
I: Dorsum of the third metacarpal bone (base)
A: Extends the wrist; abducts the hand
IN: Deep radial nerve
Extensor Carpi Ulnaris
O: common extensor tendon and the middle one-half of the posterior border of the ulna
I: medial side of the base of the 5th metacarpal
A: extends the wrist; adducts the hand
IN: deep radial nerve
Extensor Digitorum
O: common extensor tendon (lateral epicondyle of the humerus)
I: extensor expansion of digits 2-5
A: extends the metacarpophalangeal, proximal interphalangeal and distal interphalangeal joints of the 2nd-5th digits; extends wrist
IN: deep radial nerve
Extensor Digiti Minimi
O: common extensor tendon (lateral epicondyle of the humerus)
I: joins the extensor digitorum tendon to the 5th digit and inserts into the extensor expansion
A: extends the metacarpophalangeal, proximal interphalangeal and distal interphalangeal joints of the 5th digit
IN: deep radial nerve
Flexor Digitorum Superficialis
O: humeroulnar head: common flexor tendon; radial head: middle 1/3 of radius
I: shafts of the middle phalanges of digits 2-5
A: flexes the metacarpophalangeal and proximal interphalangeal joints
IN: median nerve
Abductor Digiti Minimi
O: pisiform
I: base of the proximal phalanx of the 5th digit on its ulnar side
A: abducts the 5th digit
IN: deep branch of the ulnar nerve
Flexor Digiti Minimi
O: hook of hamate and the flexor retinaculum
I: proximal phalanx of the 5th digit
A: flexes the carpometacarpal and metacarpophalangeal joints of the 5th digit
IN: ulnar nerve, deep branch
Opponens Digiti Minimi
O: hook of hamate and flexor retinaculum
I: shaft of 5th metacarpal
A: opposes the 5th digit
IN: ulnar nerve, deep branch
Dorsal Interossei 1-4
O: four muscles, each arising from two adjacent metacarpal shafts
I: base of the proximal phalanx and the extensor expansion on lateral side of the 2nd digit, lateral and medial sides of the 3rd digit, and medial side of the 4th digit
A: flex the metacarpophalangeal joint, extend the proximal and distal interphalangeal joints of digits 2-3, abduct digits 2-4 (abduction of digits in the hand is defined as movement away from the midline of the 3rd digit)
IN: ulnar nerve, deep branch