Q.Forearm
What are the parts to each phalange?
Base Shaft Head
What are the parts of the metacarpals? And what do they articulate with?
Base: proximal part, articulates with the carpal bones Shaft Head: distal part, articulates with the proximal phalanges
Why can the radius pivot on the ulna (supination and pronation?
Because of the parallel position.
Which bone is the largest bone of the carpus, that articulates with the 3rd metacarpal?
Capitate
Which feature of the forearm is inferior to olecranon process. Articulates with coronoid fossa of humerus on its anterior side?
Coronoid process of the ulna
Which bone articulates with the 4th and 5th metacarpal and has a additional feature?
Hamate
What is the enlargement on distal part of the shaft?
Head of ulna of the forearm
Which bone is moon-shaped and articulates with the radius?
Lunate
Which feature of the forearm is superior, most proximal portion that articulates with olecranon fossa of humerus and serves as a short lever for extension of the elbow
Olecranon of the ulna
Which bone is small and located on the palmer surface of the triquetrum bone?
Pisiform
What are the largest phalanges? What are the smallest?
Proximal Distal
What is inferolateral to the coronoid process, and receives the head of the radius?
Radial notch of the forearm
What of the bones in the forearm is lateral and shorter of the two?
Radius
What is the largest bone in the proximal row that articulates with the radius?
Scaphoid
Which bones of the wrist are in the proximal row, laterally to medially?
Scaphoid Lunate Triquetrum Pisiform
What forms the skeleton of the hand, between the carpals and phalanges?
The 5 metacarpals
Which part of the forearm gets thicker distally?
The Radius. Opposite off the ulna.
What is the additional feature of the hamate?
The hamate hook which extends anteriorly.
Which feature articulates with the capitulum of humerus and with radial notch of ulna?
The head of the radius
Which part of the forearm articulates with the humerus and the head of the radius?
The proximal end of the ulna
What is the distal ending on the lateral side of the shaft of the radius?
The radial styloid process
Which bone of the forearm articulates with the carpals of the wrist and the ulna? And controls supination and pronation?
The radius of the forearm
what part of the forearm gets thinner distally?
The shaft of the ulna
Which metacarpal is the "1st" metacarpal?
The shortest and thickest, the thumb
Which bone is on the lateral side and articulates with the 1st and 2nd metacarpals?
Trapezium
Which bones of the wrist are in the distal row, laterally to medially?
Trapezium Trapezoid Capitate Hamate
Which bone articulates with the 2nd metacarpal?
Trapezoid
Which bone is a pyramidal, and articulates with the articular disk of the distal radio-ulnar joint?
Triquetrum
Which bone is medial and longer of the two forearm bones?
Ulna
What is the distal ending of the head of the ulna?
Ulnar styloid process of the forearm
What is the attachment for the brachialis muscle?
Ulnar tuberosity of the forearm
What is the interosseous membrane?
thin fibrous membrane with oblique fibers running inferiorly and medially from radius to ulna
How many phalanges make up a digit?
3 phalanges per digit. Except for the thumb, 2 phalanges.
How many carpal bones comprise the wrist (carpus)? And how are they arranged?
8 carpal bones. They are arranged in proximal to distal rows of 4.
What does the ulnar notch do?
Articulates with the head of the ulna.