Download Muscle Table Unit I

Pectoral Region/Back/Shoulder
Muscle
Trapezius
Origin
Sup. nuchal line, ext. occipital
pertuberance, ligament nuchae,
spinous processes of C7-T12
Latissimus dorsi Spinous processes of T6-L5,
sacrum, iliac crest, ribs 10-12
Levator scapulae Transverse processes of C1-C4
Rhomboid major Spinous processes of C7-T5
and minor
Deltoid
Lateral 1/3 clavicle (ant fibers)
Acromian (mid fibers)
Spine of scapula (post fibers)
Supraspinatus
Supraspinous fossa
Infraspinatus
Infraspinous fossa
Teres Minor
Lateral border of scapula
superior to teres major
Lateral border of scapula
superior to inferior angle
Subscapular fossa
Teres Major
Subscapularis
Pectoralis Major
Pectoralis Minor
Medial ½ of clavicle, anterior
surface of sternum
Ribs 3-5
Serratus anterior
Lateral surfaces of ribs 8-9
Insertion
Lateral 1/3 clavicle,
acromian, spine of
scapula
Intertubercular groove
Superior angle of
scapula
Medial border of
scapula
Deltoid tubersoity
Superior facet of greater
tubercle
Middle facet of greater
tubercle
Lower facet of greater
tubercle
Medial lip of
intertubercular groove
Lesser tubercle of
humerus
Lateral lip of
intertubercular groove
Coracoid process
Costal surface of medial
scapular border
Action
Elevates, depresses, retracts, and rotates
scapula (shrug of shoulders)
Innervation
Accessory n. (CN
11)
Extends, adducts, and medially rotates
humerus
Elevates scapula
Thoracodorsal n.
Retracts and elevates scapula
Dorsal scapular n.
Flexion (ant fibers)
Abduction (mid fibers)
Extension (post fibers)
Arm abduction
Dorsal scapular n.
Axillary n.
Suprascapular n.
Laterally rotates arm
Suprascapular n.
Laterally rotates arm
Axillary n.
Medially rotates and extends arm
Lower subscapular
n.
Upper and lower
subscapular nn.
Medial and lateral
pectoral nn.
Medial pectoral n.
Medially rotates arm
Flexes, adducts, and medially rotates arm
(doesn’t extend flexed arm)
Pulls tip of shoulder down, pulls clavicle
medially to stabilize sternoclavicular joint
Protracts and rotates scapula
Long thoracic n.
Arm/Elbow/Cubital Fossa/Forearm
Muscle
Coracobrachialis
Origin
Coracoid process
Biceps brachii
Long head- supraglenoid
tubercle of scapula
Short head- coracoid process
Anterior aspect of distal
humerus and IMS
Long head- infraglenoid
tubercle
Lateral head- humeral shaft
superior to radial groove
Medial head- humeral shaft
inferior to radial groove
Humeral head- common flexor
tendon
Ulnar head- medial side of
coronoid process
Common flexor tendon
Brachialis
Triceps brachii
Pronator teres
(superficial)
Flexor Carpi
Radialis
(superficial)
Palmaris Longus
(superficial)
Flexor Carpi
Ulnaris
(superficial)
Flexor
Digitorum
Superficialis
(intermediate)
Flexor Pollicis
Longus
Insertion
Medial mid-shaft of
humerus
Radial tuberosity of
radius
Action
Arm flexor
Flexes and supinates forearm, minor
flexor of arm through short head
Innervation
Musculocutaneous
n.
Musculocutaneous
n.
Tuberosity of ulna
Flexes forearm
Olecrenon
Extends forearm, long head can also
extend and adduct arm
Radial n.
Lateral surface of midshaft radius
Pronates forearm
Median n.
Base of 2nd and 3rd
metacarpals
Flexes and abducts hand at wrist
Median n.
Common flexor tendon
Palmer aponeurosis
Flexes hand at wrist
Median n.
Humeral head-common flexor
tendon
Ulnar head- olecrenon &
posterior ulna
Humeroulnar head- medial
epicondyle & adjacent margin
of coronoid process
Radial head- oblique line of
radius
Anterior surface of radius and
radial half of interosseus
Pisiform, hamate and
base of 5th metacarpal
Flexes and adducts hand at wrist
Ulnar n.
Intermediate phalanges
of digits 2-5
(the tendons bifurcate to
go on each side of the
digits 2-5)
Base of distal phalanx of
thumb
Flexes intermediate phalanx, also flexes
metacarpophalangeal joint (MP joints) of
digits 2-5 and wrist joint
Median n.
Flexes distal phalanx of thumb, can also
flex MP joint of thumb
Median n (Ant.
Interosseous n.)
(deep)
Flexor
Digitorum
Profundus
(deep)
membrane
Anterior and medial surface of
ulna and medial half of
interosseus membrane
Pronator
Quadratus
(deep)
Brachioradialis
Extensor Carpi
Radialis Longus
Extensor Carpi
Radialis Brevis
Extensor
Digitorum
Extensor Digiti
Minimi
Extensor Carpi
Ulnaris
Anconeus
Distal anterior surface of ulna
Distal anterior surface of Pronates forearm
radius
Median n-ant
interosseous n.
(lateral half)
Ulnar n. (medial
half)
Median n. (ant
interosseous n.)
Lateral supracondylar ridge
Lateral supracondylar ridge
Lateral distal radius
Base of 2nd metacarpal
Radial n.
Radial n.
Common extensor tendon
Base of 2nd and 3rd
metacarpals
Extensor hoods of digits
2-5
Extensor hood of digit 5
Supinator
Common extensor tendon
Common extensor tendon
Common extensor tendon and
posterior border of ulna
Lateral epicondyle
Superficial part-lateral
epicondyle
deep part-supinator crest of ulna
Abductor
Proximal posterior surface of
Pollicis Longus
radius & ulna and adjacent
interosseous membrane
Extensor Pollicis Posterior surface of radius distal
brevis
to APL and adjacent
interosseous membrane
Extensor Pollicis Posterior surface of ulna distal
Longus
to APL and adjacent int. memb
Extensor Indices Posterior surface of ulna distal
to EPL, adjacent interosseous
membrane
Distal phalanx of digits
2-5
Base of 5th metacarpal
Olecranon of posterior
surface of ulna
Lateral proximal radius
flexes distal phalanx of digits 2-5, also
cause flexion at MP and wrist joint
Flexor of forearm
Extends and abducts the hand at wrist
joint
Extends and abducts the hand at wrist
joint
Extends digits 2-5
Extends digit 5
Extends and adducts the hand at wrist
joint
Accessory extension of forearm
Radial n. (deep
branch)
Radial n. (post
interosseous n.)
Radial n. (post
interosseus n.)
Radial n. (post
interosseous n.)
Radial n.
Supinates forearm
Radial n. (deep
radial n.)
Lateral base of 1st
metacarpal
Abducts thumb at carpometacarpal joint
(CM joint)
Radial n. (post
interosseous n.)
Proximal phalanx of
thumb
Extends proximal phalanx of the thumb at
MP joint, can also extend CM joint of
thumb
Extends distal phalanx of the thumb, can
also extend CM joint of thumb
Extends 2nd digit
Radial n. (post
interosseous n.)
Distal phalanx of thumb
Dorsal hood of 2nd digit
Radial n. (post
interosseous n.)
Radial n. (post
interosseous n.)
Wrist and Palm
Muscle
Abductor Pollicis
Brevis (thenar)
Origin
Flexor retinaculum,
scaphoid, trapezium
Flexor Pollicis
Brevis
(thenar)
Opponens Pollicis
(thenar)
Palmaris brevis
(hypothenar)
Abductor digiti
minimi (hypothenar)
Flexor digiti minimi
(hypothenar)
Opponens digiti
minimi (hypothenar)
Adductor Pollicis
Flexor retinaculum,
scaphoid, trapezium
Lumbricals
Palmer interossei
Dorsal interossei
Insertion
Sesamoid bone, proximal
phalanx and extensor
expansion
Sesamoid, proximal phalanx
and extensor expansion
Action
Abducts and flexes proximal
phalanx of thumb
Innervation
Median n.
(recurrent branch)
Flexes proximal phalanx of thumb
Median n.
(recurrent branch)
Flexor retinaculum,
trapezium
Flexor retinaculum, palmer
aponeurosis
Pisiform
First metacarpal (lateral side)
Proximal phalanx of 5th digit
rotates 1st metacarpal during
opposition
Draws hand at ulnar side of palm to
middle of the palm
Abduction of 5th digit
Hamate
Proximal phalanx of 5th digit
Flexes proximal phalanx of 5th digit
Hamate
5th metacarpal
Draws 5th metacarpal forward to
face the thumb (during opposition)
Adducts thumb, aids in opposition
Median n.
(recurrent branch)
Ulnar n.
(superficial br.)
Ulnar n.
(superficial br.)
Ulnar n.
(superficial br.)
Ulnar n.
(superficial br.)
Ulnar n. (deep
branch)
Skin at ulnar border of palm
Oblique head-2nd metacarpal Base of proximal phalanx,
and capitate
extensor expansion of thumb
Transverse head-3rd
metacarpal
Arise from tendons of FDP
Extensor expansion hoods of
digits 2-5
1st-med side of 2nd
Proximal phalanx and
metacarpal
extensor expansion
2nd-lateral side of 4th
1st-med side of 2nd digit
metacarpal
2nd-lat side of 4th digit,
rd
th
3 -lateral side of 5
3rd-lat side of 5th
metacarpal
Arise from two heads from
1st-lateral side of the proximal
adjacent metacarpals (big
phalanx of the index finger
head from 1st metacarpal)
2nd & 3rd-middle finger, 2nd on
lateral side, 3rd on medial side
4th-medial side of ring finger
Flex MP joints, extend IP joints
Adduct digits 2,4,5
Abduct digits 2-4, flex MP joints,
extend IP joints
Median (lateral 2)
Ulnar (medial 2)
Ulnar n. (deep
branch)
Ulnar n. (deep
branch)