Human Anatomy Vol 1

UInar nerve injury

Front of arm

Front of forearm

1-6 and 8,9

3-7 and 9

UPPER LIMB

Artery

AXILLARYARTERY

(see Fig. 4.6)

Superior thoracic

(see Fig. 4.10)

Thoracoacromial

Lateral thoracic

Anterior circumflex

humeral

Posterior circumflex

humeral

Subscapular

(see Figs 4.10 and 6.13)

1,. Flattening of medial border of forearm

2. Loss of flexion at distal interphalangeal joints of 4th and 5th
   digits


3. Loss of hypothenar eminence


4. Loss of adduction of thumb


5. Loss of abduction of all fingers
   6, Loss of adduction of all fingers


6. Marked clawing of 4th and 5th digits


7. Slight clawing of 4th and 5th digits


8. Sensory trophic and vasomotor chanooe

If uh:rar nerve is injured at the elbow, the clawing of the fingers is less, because medial half of flexor digitorum

profundus (flexorof proximal and distal interphalangeal joints) also gets paralysed. If ulnar nerve is injured

it wrist, the clawing of tne fingers is more as intact flexor digitorum profundus flexes the digits more. Thus

if lesion is proximal (near elbow), clawing is less. On the contrary, if lesion is distal (near wrist), clawing is

more. This is called "action of paradox" f ulnar paradox.

If both ulnar and median nerves get paralysed, there is complete claw-hand (see Fig.^9 .49).

.cl
tr

=
o
EL
EL
f
r
Eo
oo)
U)

Tabte A1.5: Arteries of uPper limb

Origin, course and termination

Starts at the outer border of first rib as continuation

of subclavian artery, runs through axilla and

continues as brachial artery at the lower border of

teres major muscle

From 1st part of axillary artery

From 2nd part of axillary artery, pierces clavipectoral

fascia and divides into deltoid, acromial and clavi-

cular and pectoral branches

From 2nd parl of axillary aftery runs along

inferolateral border of pectoralis minor

From third of axillary artery, runs on the anterior

aspect of inteftubercular sulcus and anastomoses

with large posterior humerus circumflex humeral

artery

From third part of axillary artery, lies along the

surgical neck of humerus with axillary nerve

Largest branch of axillary artery runs along the

muscles of posterior wall of axilla

Area of distribution

Supplies all walls of axilla, pectoral

region including mammary gland

Supplies upper part of thoracic wall and

the pectoral muscles

Supplies pectoral and deltoid muscles

Supplies the muscles of thoracic wall

including the mammary gland

Supplies the neighbouring shoulder joint

and the muscles

Supplies huge deltoid muscle, skin

overlying it and the shoulder joint

Supplies muscles of posteriorwall of axilla,

i.e. teres major, latissimus dorsi, sub-

scapularis. Takes part in anastomoses

around scapula

(Contd...)