MM O+I Review

Question 1

Adductor Pollicis

Answer 1

O-Oblique head: Capitate &
bases of metacarpals 2 &
3 Transverse head: 3rd
metacarpal - anterior
surface (palmar)
I-Medial side of proximal
phalanx of thumb
A-Adducts first digit & assists
with flexion at MCP & CMC
joint

Question 2

Flexor Pollicis Longus

Answer 2

O-Anterior surface of radius
(middle 1/2),
interosseous membrane
I-Base of distal phalanx of
first digit (thumb)
A-Flexes IP & MCP joints of
the first digit (thumb)

Question 3

Abductor Digiti Minimi

Answer 3

O- Pisiform
I-Base of proximal phalanx
of 5th digit
A-Abducts 5th digit at MCP
joint

Question 4

Ext. Hallucis Longus

Answer 4

O-Middle 1/2 of anterior
surface of shaft of fibula
and interosseous
membrane
I-Base of distal phalanx of
great (big) toe
A-Extends great toe at MTP
and and IP joints, assists
with dorsiflexion at ankle
and inversion the foot at
the subtalar and transverse
tarsal joints

Question 5

Ext. Digitorum

Answer 5

O-Lateral epicondyle of
humerus via common
extensor tendon
I-Middle & distal phalanges
of the medial 4 digits
A-Extends medial 4 digits at
MCP & IP joints & assists
wrist extension

Question 6

Flexor Digitorum Profundus

Answer 6

O-Proximal 2/3 of anterior
surface of ulna &
interosseous membrane
I-Bases of distal phalanges
of the medial 4 digits
(digits 2 - 5)
A-Primarily flexes DIP &
assists flexions of PIP,
MCP joints of the medial 4
digits & assists wrist
flexion

Question 7

Flexor Carpi Radialis

Answer 7

O-Medial epicondyle of
humerus via the common
flexor tendon
I-Base of 2nd & 3rd
metacarpal (palmar
surface)
A-Flexes & radially deviates
(abducts) the wrist

Question 8

Brachioradialis

Answer 8

O-Lateral supracondylar
ridge of the humerus (&
lateral intermuscular
septum)
I-Base of styloid process of
the radius
A-Flexes forearm at elbow
joint & rotates forearm to
the mid prone position

Question 9

Coracobrachialis

Answer 9

O-coracoid process of the
scapula (tip w/ sh.head of
biceps)
I-Middle of the medial
shaft of humerus
A-Flexion & adduction of the
humerus at gh joint
“horizontal flexion”

Question 10

Infraspinatus

Answer 10

O- Infraspinous Fossa
I- Middle facet on greater
tubercle of the humerus &
the joint capsule
A-Lateral rotation of humerus
at gh joint & stabilizes gh
joint

Question 11

Latissimus Dorsi

Answer 11

O-SP of T7 - S5 via the
thoracolumbar fascia,
posterior iliac crest, ribs
10-12, & the inferior angle
of the scapula
I-Floor of the bicipital
groove of the humerus &
medial lip of of
intertubercular sulcus
A-Extends, adducts &
medially rotates the
humerus & assits with
forced inspiration

Question 12

Deltoid

Answer 12

O-Lateral 1/3 of clavicle,
acromion process & the
spine of scapula (inferior
border)
I- Deltoid Tuberosity
A-Abducts humerus at gh jt.
(all bellies) Anterior: flexion
& medial rotation of
humerus at gh jt. Middle:
abducts humerus
Posterior: extension &
laterally rotates humerus at
gh.

Question 13

Pec. Major

Answer 13

O-Clavicular head: Anterior
surface of medial half of
clavicle Sternocostal
head: Anterior surface of
sternum & the upper 6
costal cartilages
Abdominal head:
Aponeurosis of external
obliques
I-Lateral lip of
intertubercular sulcus &
the crest of the greater
tubercle of the humerus
A-Adducts, medially rotates &
flexes humerus at gh joint

Question 14

Pronator Teres

Answer 14

O- Humeral head: Medial
epicondyle of the
humerus (above CFO)
Ulnar head: coronoid
process of the ulna (med
surface)
I- Mid lateral shaft of radius
A- Pronates forearm assists with elbow flexion

Question 15

Serratus Anterior

Answer 15

O- Ribs 1-8/9
I- Anterior surface of the
medial border of the
scapula & inferior angle
A-Protracts scapula, rotates
scapula superiorly &
elevates ribs when scapula
is fixed

Question 16

Rhomboid Major

Answer 16

O- SP of T2-T5
I- Vertebral border of scapula below the spine
A- Retracts, elevates and rotates scapula inferiorly

Question 17

Spinalis Thoracis

Answer 17

O-SP’s of T11 - L5, sacrum,
PSIS & the posterior iliac
crest Common Origin
I-SP’s of T1 - T8 (varies)
A-Extension & ipsilateral flexion
of the spine

Question 18

Teres Minor

Answer 18

O-Lateral border of scapula
(posterior surface,
superior 2/3)
I-Inferior facet of greater
tubercle of the humerus &
the joint capsule
A-Lateral rotation of humerus
at gh joint & stabilizes gh
joint

Question 19

Trapezius

Answer 19

O-Medial 1/3 of the superior
nuchal line, inion (EOP),
ligamentum nuchae & SP
of C7 - T12
I-Lateral third of the
clavicle, acromion
process & the spine of the
scapula
A-Superior fibers: elevates,
rotates scapula superiorly
& extends head & neck;
(UL) contralateral rotation
of head & neck, lateral
flexion to the same side
Middle fibers: retracts
scapula Inferior fibers:
depresses scapula &
superiorly rotates scapula