LAB TEST (O/I/A/In) Flashcards
Flexor carpi radialis
O: medial epicondyle of humerus
I: base of 2nd and 3rd metacarpal
A: flexion & abduction (radial deviation) of hand at wrist jnt
In: Median n.
Flexor carpi ulnaris
O: medial epicondyle
I: pisiform, hook of hamate & base of 5th metacarpal
A: flexion & adduction (ulnar deviation) of hand at wrist jnt
In: ulnar n.
Extensor Carpi radialis longus
O: lateral supracondylar ridge of humerus
I: base of 2nd metacarpal
A: extension and abduction of hand at wrist jnt
In: radial n.
Extensor carpi radialis brevis
O: lateral epicondyle of humerus
I: base of 3rd metacarpal
A: Extension and abduction of hand at wrist jnt
In: radial n.
Extensor carpi ulnaris
O: lateral epicondyle of humerus & posterior border of ulna
I: base of 5th metacarpal
A: extension & adduction (ulnar deviation) of hand at wrist jnt
In: radial n.
Pronator Teres
O: medial epicondyle of humerus and coronoid process of ulna
I: mid-lateral shaft of radius
A: pronation of forearm at radio-ulnar jnt, flexion of forearm at elbow jnt
In: median n.
Pronator Quadratus
O: distal shaft of ulna
I: distal shaft of radius
A: Pronation of forearm at radio-ulnar jnt
In: median n.
Supinator
O: Lateral epicondyle of humerus & supinator crest of ulna
I: Lateral proximal 1/3 of radius
A: supination of forearm at radio-ulnar jnts
In: radial n.
Biceps brachii
O: (long head) supraglenoid tubercle of scapula; (short head) coracoid process of scapula
I: radial tuberosity of radius & deep fascia of forearm via bicipital aponeurosis
A: flexion of forearm at elbow jnt, supination of forearm at radio-ulnar jnt, flexion of humerus at shoulder jnt
In: musculocutaneous n.
Brachioradialis
O: lateral border of distal end of humerus
I: superior to styloid process of radius
A: flexion of forearm at elbow jnt
In: radial n.
Triceps brachii
O: (long head) infraglenoid tubercle of scapula; (lateral head) lateral and posterior surface of humerus above radial groove; (medial head) posterior surface of humerus, below radial groove
I: olecranon process of ulna
A: extension of humerus at shoulder jnt & extension of forearm at elbow jnt
In: radial n.
Supraspinatus
O: supraspinous fossa of scapula
I: greater tubercle of humerus
A: assists deltoid muscle in abduction of humerus at shoulder jnt
In: Suprascapular n.
Deltoid (ant, middle, post)
O: lateral 1/3 of clavicle, acromion and spine of scapula
I: deltoid tuberosity of humerus
A: (ant) flexion and medial rotation of humerus; (lateral) abduction of humerus; (post) extension & lateral rotation of humerus
In: axillary n.
Coracobrachialis
O: coracoid process of scapula
I: middle 1/3 of medial surface of shaft of humerus
A: flexion and adduction of humerus at shoulder jnt
In: musculocutaneous
Latissimus Dorsi
O: Spinous processes of T7-L5, sacral crest, iliac crest and inferior 4 ribs
I: floor intertubercular groove of humerus
A: extension, adduction & medial rotation of humerus
In: thoracodorsal n.
Pectoralis Major (upper and lower fibers)
O: (clavicular head) medial clavicle; (sternocostal head) sternum and costal cartilages of ribs 2-6
I: greater tubercle and lateral lip of intertubercular groove of humerus
A: flexion, adduction & medial rotation of humerus
In: medial and lateral pectoral n.
Pectoralis minor
O: ribs 2-5 near costal cartilages
I: coracoid process of scapula
A: abduction & downward rotations of scapula; assists in elevation of ribs when pectoral girdle is fixed
In: medial pectoral n.
Teres major
O: inferior angle of scapula
I: medial lip of intertubercular groove of humerus
A: Extends and assists in adduction & medial rotation of humerus at shoulder jnt
In: lower subscapular n.
List the shoulder Medial rotators
- ant deltoid fibers
- latissimus dorsi
- pec major
- teres major
- teres minor
- ## subscapularis
List the shoulder lateral rotators
- post deltoid fibers
- ## infraspinatus
Infraspinatus
O: infraspinous fossa of scapula
I: greater tubercle of humerus
A: Lateral rotation of humerus at shoulder jnt
In: suprascapular n.
teres minor
O: inferior lateral border of scapula
I: greater tubercle of humerus
A: lateral rotation of humerus at shoulder jnt
In: axillary n.
subscapularis
O: subscapular fossa of scapula
I: lesser tubercle of humerus
A: medial rotation of humerus at shoulder jnt
In: upper & lower subscapular n.
Levator scapula
O: transverse processes of C1-C4
I: upper 1/3 of medial border of scapula
A: elevation & downward rotation of scapula
In: dorsal scapular n. and cervical n. C3-C5
Rhomboid major
O: spinous processes of T2-T5
I: lower 1/3 of medial border of scapula
A: elevation, adduction & downward rotation of scapula; stabilizes scapula
In: dorsal scapular n.
Rhomboid minor
O: spinous processes of C7-T1
I: medial border of scapula superior to spine
A: elevation, adduction & downward rotation of scapula; stabilizes scapula
In: dorsal scapular n.
Trapezius (upper, middle, lower)
O: occipital bone, ligamentum nuchae & spinous processes C7-T12
I: lateral 1/3 of clavicle, spine & acromion of scapula
A: (sup) upward rotation of scapula, can also help extend head; (middle) adduction of scapula–retraction; (inf) depression & upward rotation of scapula
In: accessory n. (CN XI) and cervical spinal n. C3-C5
Serratus anterior
O: ribs 1-8
I: medial border and inferior angle of scapula
A: abduction & upward rotation of scapula (protraction)
In: long thoracic n.
Flexor hallucis longus
O: distal 2/3 of fibula
I: distal phalanx of 1st toe
A: flexion of 1st toes and plantarflexion of foot
In: tibial n.
Flexor digitorum longus
O: posterior surface of tibia
I: distal phalanges of toes 2-5
A: flexion of digits 2-5 & plantarflexion of foot at ankle jnt
In: tibial n.