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The Hand

Upper Extremities--Part I

Anatomists divide the bones of the upper limbs, or extremities into what main groups? Hand, forearm, arm, and shoulder girdle
The hands consists of how many bones? Twenty-seven bones
The bones of the digits (fingers and thumb) which are long bones and consists of a cylindric body and articular ends are called? Phalanges
The bones of the palms that are cylindric in shape and slightly concave anteriorly are called? Metacarpals
The bones of the wrist are called? Carpals
How many digits are in the hand? Five
The digits contain a total of how many phalanges? Fourteen
How many metacarpals are in the hand? Five
The metacarpal heads that are visible on the dorsal hand in flexion, are known as the _______? Knuckles
How many carpal bones are in the wrist? Eight
The carpal bones are fitted closely together and arranged in two __________ rows. Horizontal
This carpal is the largest bone in the proximal carpal row, has a tubercle on the anterior and lateral aspect for muscle attachment, also called the navicular bone? Scaphoid
This carpal bone articulates with the radius proximally and is easy to recognize because of its crescent shape, known as semilunar. Lunate
The ______ is roughly pyramidal and articulates anteriorly with the harnate,known as cuneiform or triangular. Triquetrum/triquetral
The ______ is a pea-shaped bone situated anterior to the triquetrum and is easily palpated. Pisiform
The _____ has a tubercle and groove on the anterior surface, also known as greater multangular. Trapezium
The tubercles of the trapezium and scaphoid comprise the lateral margin of the ____ groove. Carpal
The _____ has a smaller surface anteriorly than posteriorly, also known as lesser multangular. Trapezoid
The _________ articulates with the base of the third metacarpal and is the largest and most centrally located carpal, also known as os magnum. Capitate
The wedge-shaped ________ exhibits the prominent hook of ________, which is located on the anterior surface. Hamate
The hamate and the pisiform form the _____ margin of the carpal groove. Medial
A triangular depression is located on the posterior surface of the wrist and is visible when the thumb is abducted and extended, and is formed by the tendons of the two major muscles of the thumb is known as what? Anatomic snuffbox
Tenderness in the snuffbox area is a clinical sign suggesting fracture of the _____--the most commonly fractured carpal bone. Scaphoid
The anterior or palmar surface of the wrist is concave from side to side and form the what? Carpal sulcus
A strong fibrous band, attaches medially to the pisiform and hook of harnate and laterally to the tubercles of the scaphoid and trapezium is called? Flexor retinaculum
The passageway created between the carpal sulcus and flexor retinaculum is known as the what? Carpal tunnel
Carpal tunnel syndrome results from ___________ of the median nerve inside the carpal tunnel. Compression
Created by: J. Renee