Lab 8 AOIs Flashcards
Pectoralis major
Muscle Crossing Shoulder Joint
A: Adducts, flexes, and medially rotates arm
O: clavicle, sternum, and ribs
I: Humerus
(Intertubercular sulcus)
Both
Latissimus dorsi
Muscle Crossing Shoulder Joint
A: Adducts, extends and
medially rotates arm
O: Scapula, vertebral
column, and iliac crest
I: Humerus
(Intertubercular sulcus)
Both
Trapezius
Posterior Thorax
A:Adducts and rotates
scapula; elevation and depression of
scapula
O: Superior nuchal line of
Occipital bone and
vertebral column
I: Lateral Clavicle and
scapular spine and
acromion
Both
Deltoid
Muscle Crossing Shoulder Joint
A: Abducts, flexes, and rotates
arm medially and laterally
O: Clavicle and scapula
I: Deltoid tuberosity of
humerus
Both
Levator Scapulae
Posterior Thorax
A: Elevation of scapula, lateral
neck flexion
O: Transverse processes of
cervical vertebrae
(C1-C4)
I: Medial and Lateral
border (scapula)
Both
Pectoralis minor
Anterior Thorax
A: Stabilizes, abducts &
laterally rotates scapula
O: Ribs 3-5
I: Scapula (coracoid process)
Both
Subscapularis
Shoulder joint
A: Medial rotation of arm,
stabilizes humerus head
in glenoid cavity
O: Subscapular fossa of
scapula
I: Lesser tubercle of
humerus
Both
Infraspinatus
Shoulder joint
A: Lateral rotation of arm,
stabilizes humerus head
in glenoid cavity
O: Infraspinous fossa of
scapula
I: Greater tubercle of
humerus
Both
Supraspinatus
Shoulder joint
A: Abduction of arm,
stabilizes humerus head
in glenoid cavity
O: Supraspinous fossa of
scapula
I: Greater tubercle of
humerus
Both
Teres minor
Shoulder joint
A: Lateral rotation and
adduction of arm,
stabilizes humerus head
in glenoid cavity
O: Lateral border of
scapula
I: Greater tubercle of
humerus
Both
Teres major
Shoulder joint
A: Medial rotation,
adduction & extension
of arm
O: Inferior angle and
lateral border of
scapula
I: Greater tubercular
sulcus of humerus
Both
Coracobrachialis
Shoulder joint
A: Flexion and adduction
of arm
O: Coracoid process of
scapula
I: Greater tubercular
sulcus of humerus
Both
Biceps brachii
(long and
short head)
Anterior Arm Muscles
A: Supination and flexion
of forearm
O: Supraglenoid tubercle
& coracoid process of
scapula
I: Radial tuberosity
Both
Brachialis
Anterior Arm Muscles
A: flexion of forearm
O: Anterior distal shaft of
humerus
I: Ulnar tuberosity and
coracoid process of
ulna
Both
Triceps brachii
(long , lateral
, and medial
head)
Posterior arm
A: Extension of
forearm; stabilizes
shoulder joint
O: Infraglenoid tubercle (scapula)
and proximal posterior shaft of
humerus
I: Olecranon process (ulna)
Both
Brachioradialis
Anterior forearm
A: Flexion of forearm;
pronation of forearm
(when supinated);
supination of forearm
(when pronated)
O: Distal shaft of
humerus
I: Styloid process of radius
Both
Flexor carpi
radialis
Anterior superficial forearm
A: Wrist flexion and hand
abduction
O: Medial epicondyle
(humerus)
I: Metacarpals II and III
Both
Palmaris Longus
Anterior superficial forearm
A: Wrist flexion (weak)
O: Medial epicondyle
(humerus)
I: Palmar aponeurosis
(sheet-like tendon)
Both
Flexor Carpi Ulnaris
Anterior superficial forearm
A: Wrist flexion and hand
adduction
O: Medial epicondyle of
humerus and
olecranon process
and posterior border
(ulna)
I: Pisiform and hamate
(carpal bones)
Both
Pronator teres
Anterior superficial forearm
A: Forearm pronation
O: Medial epicondyle
(humerus) and
coronoid process of
ulna
I: Lateral mid-shaft of
radius
Both
Flexor pollicis
longus
Anterior Deep Forearm
A: Flexion of the thumb
O: Mid-shaft of radius;
coronoid process
(ulna)
I: Distal phalanx of I
(thumb)
Human
Flexor
digitorum
profundus
Anterior Deep Forearm
A: Flexion of wrist and
fingers (2-5)
O: Proximal shaft of ulna
I: Distal phalanges II- V
Both
Supinator
Posterior Deep Forearm
A: Supination of forearm
O: Ulna (posterior
proximal shaft);
lateral epicondyle of
humerus
I: Radius (lateral proximal
shaft)
Both
Flexor Carpi Radialis
Anterior superficial forearm
A: Wrist flexion and hand
abduction
O: Medial epicondyle
(humerus)
I: Metacarpals II and
III
Both
Palmaris Longus
Anterior superficial forearm
A: Wrist flexion (weak)
O: Medial epicondyle
(humerus)
I: Palmar aponeurosis
(sheet-like tendon)
Both
Flexor Carpi Ulnaris
Anterior superficial forearm
A: Wrist flexion and hand
adduction
O: Medial epicondyle of
humerus and
olecranon process and
posterior border (ulna)
I: Pisiform and hamate
(carpal bones)
Both
Pronator Teres
Anterior superficial forearm
A: Forearm pronation
O: Medial epicondyle
(humerus) and coronoid
process of ulna
I: Lateral mid-shaft of
radius Both
Extensor carpi
radialis longus
Posterior superficial forearm
A: Extension of wrist and
abduction of hand
O: Supracondylar ridge
(humerus)
I: Metacarpal II
Both
Extensor carpi
radialis brevis
Posterior superficial forearm
A: Extension of wrist and
abduction of hand
O: Lateral epicondyle
(humerus)
I: Metacarpal III
Both
Extensor digitorum
Posterior superficial forearm
A: Extension of wrist and
fingers (2-5)
O: Lateral epicondyle
(humerus)
I: Phalanges II-V
Both
Extensor carpi ulnaris
Posterior superficial forearm
A: Extension of wrist;
adduction of wrist
O: Lateral epicondyle
(humerus) and ulna
I: Metacarpal V
Both
Abducor pollicis longus
Posterior Deep Forearm
A: Abduction & extension of
thumb
O: Radius & ulna (both
proximal posterior);
interosseous membrane
I: Metacarpal I (base)
Both
Extensor pollicis longus
Posterior Deep Forearm
A: Extension of thumb
O: Ulna (posterior midshaft); interosseous
membrane
I: Distal phalanx of
thumb
Both
Supinator
Posterior Deep Forearm
A: Supination of forearm
O: Ulna (posterior proximal
shaft); lateral epicondyle
of humerus
I: Radius (lateral
proximal shaft)
Both
