Dr.Backbone

The ulnar nerve pierced the medial intermuscular septum

The basilic vein pierced the deep fascia in the arm

The main blood supply of the head of humerus هو Posterior circumflex humeral artery جي من Axillary artery

The main blood supply of the shaft of humerus هو Nutrient artery جي من Brachial artery

Princeps artery ( from radial artery) خاص ب ال thumb

The power grip مهمة الـــ extrinsic hand muscle (اللي في الفورآرم).

The key pinch Adduction of the thumb and abduction of the index With the 1st doral interosseous muscle + adductor policis

The most important sensation of the hand is the median nerve

The Guyon's canal Passes through it the deep palmar branch of the ulnar artery And the deep motor branch of the ulnar nerve around the medial side of hook of hamate

The opponens digiti minimi Do lateral rotation

The most mobile carpometacarpal joint= the 1st Then the 5th The most fixed is the 2nd

APL =Abductes the thumb from the 1st carpometacarpal joint لكن APB = Abductes the thumb from the metacarpophalengeal joint أكثر

Adbuctor pollicis brevis =abduction of metacarpophalengeal joint + بداية ال abduction of thumb يكون ب ال APL لكن بعدها ال full abduction يكون ب APB

Opponens pollicis Function = opposition The first 90° rotates anatomically from the base of the 1st metacarpal bone Than the opponens pollicis

Thumb has a saddle joint at its carpometacarpal articulation, and it is not connected by the deep transverse metacarpal ligament. That’s why it has a wide range of motion.

The fibrous digital sheath of the little finger and the thumb is continuous with the forearm ف تقدر توصل الالتهاب من الإصبع للفورآرم

Fibrous digital sheath Passing through it the long flexor tendond It prevents bowing of this tendons

The Palmaris brevis muscle insert into the derm of the skin of medial edge of palm + very thin ms ***Increase coping of hand *The only muscle supplied by superficial sensory branch of ulnar nerve**

Anconeus muscle=abduction of ullllna during pronation!!!!

Radius=rotates Ulna=abductes