Regions & Muscles of arm

1. ANATOMY-I
Dr. Naveed Khalid

2. Axilla

3. Axilla (Armpit)
• Is a pyramid-shaped space between the upper
thoracic wall and the arm
• Axilla

5. • The overall 3D shape of the axilla looks slightly like a pyramid. It
consists of four sides, an open apex and base:
• Apex – also known as the axillary inlet, it is formed by lateral
border of the first rib, superior border of scapula, and the posterior
border of the clavicle.

6. • Lateral wall – formed by intertubercular groove of
the humerus.
• Medial wall – consists of the serratus anterior and the thoracic
wall (ribs and intercostal muscles).
• Anterior wall – contains the pectoralis major and the
underlying pectoralis minor and the subclavius muscles.
• Posterior wall – formed by the subscapularis, teres major and
latissimus dorsi.

8. contents
• Brachial plexus
• Axillary artery
• Axillary Vein
• Axillary Lymph nodes
• Axillary tail (tail of Spence) is a superolateral extension of the mammary
gland

9. Cuboital Fossa

10. Cubital fossa
• V-shaped interval on the anterior aspect of the
elbow

11. boundaries
• Laterally
– Brachioradialis muscle
• Medially
– Pronator teres muscle
• Superiorly
– An imaginary horizontal line connecting the epicondyles
of the humerus
• Floor
– Brachialis muscle
– Supinator muscle

12. contents
• Lateral to Medial
– Radial nerve
– Biceps tendon
– Brachial artery
– Median nerve
• Mnemonic: Rafay Beats Bad Men

15. Carpal tunnel
Narrow passageway surrounded y bones and ligaments on the palm side of hand.

16. boundaries
• Anteriorly
– Flexor retinaculum (Transverse Carpal Ligament)
• Posteriorly
– Carpal bones

17. contents
• Median nerve
• Flexor pollicis longus Tendons
• Flexor digitorum profundus Tendons
• Flexor digitorum superficialis Tendons

18. Muscle
s

19. Deltoid

22. COMPARTMENTS OF ARM
The upper arm is divided into an
• Anterior fascial compartment
• Posterior fascial compartment
• Each having its muscles, nerves, and arteries

27. MUSCLES OF THE ANTERIOR FASCIAL COMPARTMENT

31. CORACHOBRACHILIS

33. CORACHOBRACHILIS

35. BRACHIALIS

36. Brachialis

39. CONTENTS OF THE POSTERIOR FASCIAL COMPARTMENT
OF UPPER ARM
• Muscle: The three heads of the triceps muscle
• Nerve supply: Radial nerve
• Blood supply: Profunda brachii and ulnar collateral arteries
• Structures passing through the compartment: Radial nerve and
ulnar nerve

41. Triceps Brachii

44. MUSCLE OF THE POSTERIOR FASCIAL COMPARTMENT