muscle s of upper limb
TRANSCRIPT
MUSCLES OF UPPER LIMB
Muscles of shoulder region
Muscles of elbow region
Muscles of wrist region
Muscles of hand
Muscles of shoulder region
From scapula to
humerus
From trunk to
scapula
From trunk to
humerus
Subscapularis Serratus anterior Pectoralis major
Supraspinatus Trapezius latissimusdorsi
Infraspinatus Rhomboidis major
Teres minor Rhomboidis minor
Teres major Levator scapulae
coracobrachialis Pectoralis minor
From scapula to humerus
Lesser tubercle
Upper and lower sub
scapular nerves
Medial rotation and
adductor of arm
Greaterv tubercle
Supra scapular
nerve C5 C6
Initiates abduction of
arm (15 degrees)
Supra scapular nerve C5 C6
Lateral rotation of arm
Greater tubercle
Axillary nerve C 5 C6
Muscles of rotator cuff
Subscapularis
Supraspinatus
Infraspinatus
Teres minor
Bicipital groove
medial lip
Lower subscapular nerve
Medial rotation and
adductor of arm
Medial border
Musculo cutaneous
nerve C 5,6,7
Flexor of arm
From trunk to scapula
Medial border
Upper 8 ribs
Long thoracic nerve or
Nerve of bell C5,6,7
Pushing and punching
movements
Transverse process
of C1 C2 C3
Sup ,angle
Branch from dorsal
scapular nerve C 5
Elevates scapula
Steadies scapula during
movements of arm
TRAPEZIUS
Spinal part of accessary nerve
Elevates scapula
Retract scapula
Steadies scapula
Dorsal scapular nerve C5
C7 –T1 minor
T2 –T5 major
Root of spine
Retract scapula
Medial border
3 4 5 ribs
Corocoid process
Medial & lateral
pectoral nerves
Drawes scapula forwards
From trunk to humerus
Lateral lip of
biciptal groove
Medial & lateral
pectoral nerves
Adduction
Medial rotation
2nd to 6th costal cartilages
Post.layer of lumbar
fascia thus attatching
the muscle to L-S spine
T 7 –T 12 spines
Inter
tubercular
sulcus
Thoracodorsal nerve C 6 7 8
Climbing
muscle
Adduction
External & medial
rotation as in swimming
Deltoid tuberosity
Axillary nerve C 5 6
Acromial fibres –abductor of arm
Ant .fibres -flexors & medial rotator
post,.fibres -extensor & lateral rotator
Muscles of elbow region
Flexors Extensors Pronators supinators
Brachialis Triceps Pronator teres Supinator
Biceps Anconeus Pronator
quadratus
Biceps
Brachioradiolis
flexors
Suparglenoid tubercle
Radial tuberosity
Long head
Musculocutaneous nerve C5 C6
Actions 1. strong supinator
when arm is flexed
2. flexor of arm
Biceps
Musculocutaneous nerve C5
C6
flexor of arm
Ulnar tuberosity
Radial nerve C5 6 7 *
Flexor of fore arm in
mid prone position
Extensors
Radial nerve
Extensor of elbow
Spiral groove
Infra glenoid
tubercle
Radial nerve
Weak extensor of
elbow
Pronators
Common
flexor origin
Median nerve
Pronator of elbow
Flexor of elbow
Coronoid process
Anterior interosseous
nerve
Pronator of fore arm
Supinators
Posterior
interosseous nerve
Supinator of fore arm
Muscles of wrist region
Flexors Extensors
Flexor carpi ulnaris Extensor carpi ulnaris
Flexor carpi radialis Extensor carpi radialis
longus
Palmaris longus Extensor carpi radialis
brevis
Flexors
Median nerve
Ulnar nerve
Median nerve
Inserted into flexar retinaculum
Extensors
Radial nerve
Posterior intrrosseus nerve
Muscles of hand
Extrinsic muscles
Flexors Extensors Long muscles
FDP Extensor digitorum Flexor pollicis longus
FDS Extensor digiti minimi Abductor pollicis
longus
Extensor indicis Extensor pollicis
longus
Intrinsic muscles
Interossei Lumbricals Short muscles of
thumb
Short muscles of
little finger
Thenar
muscles
Hypothenar
muscles
Adductor pollicis
Flexor
ABductor
Opponence
pollicis brevis
Flexor
ABductor
Opponence digiti
minimi
Extrinsic muscles
flexors
Medial half by ulnar nerve
Lateral half by AIN of median nerve
Median nerve (sublimus)
Extensors
Common extensor origin
Base of middle
and distal phalanx
dorsal aspect
Posterior interossei nerveBase of middle and distal
phalanx dorsal aspect of little
finger
Posterior interosseus nerve
Extension of
index finger
Joins the tendon of extensor digitorum
Long muscles
Anterior
interosseous
nerve
Flexes the
distal phalynx
of thumb
Base of the
metacarpal
Posterior
interosseous
nerve
Abduction
& extension
of thumb
Extention of all
joints of thumb
Posterior interosseous nerve
Intrinsic muscles
Palmar
shorthead Long head
Ulnar nerve
Base of proximal
phalynx of same side
Digital
expansion
1st medial side of 1st metacapal
2nd medial side of 2nd metacapal
3rd lateral side of 4th metacarpal
4th lateral side of 5th meta crpal
ADDuction of digits
Dorsal
L M
ABductor of
digitsUlnar nerve
FDP
tendon
123
4
1st & 2nd median nerve
3rd & 4th ulnar nerve
Flexion at MP JOINT
Extension at PIP JOINT
Radial side
of MP joint
THENAR
MUSCLES
Median
nerve
Abduction
Flexion
Opposition of
THUMB
Ulnar nerve
Adducts the thumb
HYPOTHENAR
MUSCLES
Ulnar nerve
Pisiform
Hamate
Flexes 5th
metacarpal &
rotates it laterally