🫀 ANATOMY
Upper Limb Anatomy Detailed Explanation Bones Muscles Nerves Joints
Complete upper limb anatomy explained in detail covering bones joints muscles nerves blood supply and clinical importance for medical students nursing physiotherapy and exam preparation.
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Frequently Asked Questions
❓ What is upper limb anatomy?
Upper limb anatomy is the study of the structure of the shoulder arm forearm and hand including bones joints muscles nerves blood vessels and lymphatics responsible for movement sensation and manipulation.
❓ Which bones form the upper limb?
The bones of the upper limb include the clavicle scapula humerus radius ulna eight carpal bones five metacarpals and fourteen phalanges.
❓ What are the main regions of the upper limb?
The upper limb is divided into the pectoral region axilla arm forearm and hand.
❓ What is the function of the pectoral girdle?
The pectoral girdle connects the upper limb to the axial skeleton and allows a wide range of shoulder movements.
❓ Which joint provides the greatest range of motion in the upper limb?
The shoulder joint provides the greatest range of motion due to its ball and socket structure.
❓ What muscles form the rotator cuff?
The rotator cuff muscles are supraspinatus infraspinatus teres minor and subscapularis.
❓ What is the brachial plexus?
The brachial plexus is a network of nerves formed by spinal nerves C5 to T1 that supplies motor and sensory innervation to the upper limb.
❓ Which nerve injury causes wrist drop?
Injury to the radial nerve causes wrist drop due to paralysis of wrist and finger extensors.
❓ What is carpal tunnel syndrome?
Carpal tunnel syndrome is compression of the median nerve beneath the flexor retinaculum causing pain numbness and weakness in the hand.
❓ Which artery supplies most of the upper limb?
The subclavian artery continues as the axillary artery and then the brachial artery supplying most of the upper limb.
❓ What is the anatomical snuffbox?
The anatomical snuffbox is a triangular depression on the lateral wrist containing the radial artery and is clinically important in scaphoid fractures.
❓ Which muscles abduct the fingers?
The dorsal interossei muscles abduct the fingers while palmar interossei adduct them.
❓ What causes claw hand deformity?
Claw hand deformity is caused by ulnar nerve injury leading to paralysis of intrinsic hand muscles.
❓ What is the function of lumbrical muscles?
Lumbricals flex the metacarpophalangeal joints and extend the interphalangeal joints of the fingers.
❓ Why is the scaphoid prone to avascular necrosis?
The scaphoid has a retrograde blood supply making its proximal part vulnerable to avascular necrosis after fracture.