Functional Anatomy Deck 2 Flashcards
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Ulna
On the posterior side of the ulna is the olecranon process which serves as the insertion for the triceps brachii.
On the anterior side, the radial not h of the ulna articulates with the head of the radius.
The coronoid process is inferior to the trochlear notch and the ulnar tuberosity serves as the insertion point for the brachial is muscle.
At the distal end of the ulna is the ulnar styloid process.
Radius
Inferior to the anterior portion of the head of the radius is the radial tuberosity which serves as the insertion for the biceps brachia muscle.
At the distal end of the radius is the ulnar notch which articulates with the head of the ulna and a pointed projection called the radial styloid process.
Elbow Joint
Classified as a hinge joint that only allows flexion and extension as a result of interaction between the trochlear of the humerus and the trochlear notch of the ulna.
Proximal Radioulnar Joint
The head of the radius articulates with the capitulum and rotates in the radial notch of the ulna. The proximal Radioulnar joint works with the distal Radioulnar joint between the head of the ulna and the ulna notch of the radius to produce two actions: pronation supination.
Pronation
Internal Rotation of the hand which moves the hand from the palm up to the palm down position.
Supination
External rotation of the hand which moves the hand from the palm down to the palm up position.
Anatomy Of The Wrist
The wrist contains 29 bones
The radius and ulna-2
Carpal bones-8
Metacarpal bones-5
Phalanges-14
The bones are arranged in two concave rows. From the anatomical position these bones can be described from lateral to medial starting with the proximal row (closest to the wrist).
Carpal Bones
Starting from the radial side: scaphoid-> lunate-> triquetrum-> pisiform
Starting again distally from the radial side: trapezium-> trapezoid-> capitate-> hamate
