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The Hand
Upper Extremities--Part I
| Question | Answer |
|---|---|
| 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
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