Q.Forearm

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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.


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