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AP 1 - Lecture 8
anatomy and positioning of the wrist
| Term | Definition |
|---|---|
| ______ carpal bones form the wrist | 8 |
| Carpal bones are classified as ______ bones | short |
| the distal row of the Carpal bones articulate with the: | metacarpals |
| the proximal row of the carpals articulate with the: | radius to form the wrist joint |
| the carpal bones are composed of ______ bone with a covering of ______ bone and are held together by _______ | cancellous; compact; ligaments |
| the intercarpal joints are classified as what kind of joints? | gliding |
| also referred to as Navicular and part of the wrist joint proper | scaphoid |
| carpal bone of the wrist that fractures easily and is difficult to heal due to its poor blood supply: | Scaphoid |
| also referred to as semilunar, part of the wrist joint proper | lunate |
| referred to as triquetral or cuneiform | triangular/triquetrum |
| smallest carpal bone, rests on top of triangular | pisiform |
| also referred to as greater multangular, forms the saddle joint with the 1st metacarpal | trapezium |
| also referred to as lesser multangular | trapezoid |
| also referred to as os magnum, it is the largest carpal bone | capitate |
| also referred to as unciform, has a distinguishable hook-like process called the humular process or hook of hamate | hamate |
| on the posterior lateral surface of the wrist (thumb side), is a triangular depression see when thumb is abducted and extended called the? | anatomical snuff box |
| the depression that overlies the scaphoid and radial artery, tenderness in this area is indicative of a Navicular scaphoid fracture | anatomical snuff box |
| the posterior surface of the carpal bones is convex and is called the? | carpal bridge |
| the anterior or palmer surface of the carpal bones is concave and is called the? | carpal tunnel |
| another name for carpal tunnel? | carpal sulcus or carpal canal |
| passing through the carpal tunnel is the ______ nerve and tendons of the ______ muscles of the digits | median; flexor |
| a condition in which the median nerves are compressed by ligaments and bones; caused by repetitive movements or overuse; may experience pain burning, or tingling sensation of hands radiating to the forearm | carpal tunnel syndrome |
| The wrist joint proper is formed by the base of the ______, ______ and ______ | radius; scaphoid; lunate |
| triangular articulates with the base of the radius when the hand is in a ____ position with ______ flexion | PA; ulnar |
| wrist joint proper is classified as a _______ joint allowing what movements? | condyloid; flexion, extension, abduction; adduction |
| the wrist joint proper is a ______ joint enveloped in an articular capsule; it is strengthened by which two ligaments? | synovial; radial collateral and ulnar collateral ligaments |
| which two bones make up the bone that form the forearm? | radius and ulna |
| the ______ is located on the lateral (thumb) side of the forearm in the true anatomical position | radius |
| the _______ is located on the medial (5th finger) side of the forearm in the true anatomical position | ulna |
| the base of the radius is located on the ______ end | distal |
| what bone is the expanded portion of the wrist joint proper, with its articulations with scaphoid and lunate? | base of the radius |
| a small pointed lateral process on the base of the radius is called the? | styloid process of radius |
| the head of the ulna is located on the? | distal end |
| below the head of the ulna, it narrows to become the? | neck of the ulna |
| a small pointed process superior to the head of the ulna is called the? | styloid process of the ulna |
| one the base of the radius is a depression called the ______ ______ of radius to form the distal radioulnar joint | ulnar notch |
| the distal and proximal radioulnar joints are ______ joints, which allow what movements of the hand? | pivot; supination and pronation |
| the distal radioulnar joint is formed by the: | head of the ulna and the ulnar notch of the radius |
| what are the four routine projections of the wrist: | PA; 45-degree semi-pronated oblique; 45-degree semi-supinated oblique; lateral |
| what are the exposure factors for the routine projections of the wrist, mAs and kV? | 50-60 kV and 4 mAs |
| when are special projections of the wrist performed? | when routine projections have demonstrated an abnormality which requires further investigation - must be requested by a physican |
| special projections of the wrist performed of the: | navicular and carpal tunnel |
| why are special projections of the scaphoid/navicular performed? | because it is the most easily fractured and most difficult bone of the wrist to heal |
| the blood supply to the scaphoid enters on its ______ surface | posterior |
| because navicular is curved, it must be elongated to straighten out the curvature either by ______ or ______ ____ angulation | positioning; central ray |
| a series of wrist projections performed one 10x12 IR, using a special lead blocker which allows for five exposures one one image receptor | a carpogram |
| projections performed as a navicular series or wrist instability series when doing a carpogram | -45 degree semi-pronated oblique -lateral -45 degree semi-supinated oblique -PA with ulnar flexion -AP with ulnar flexion |
Created by:
teresachristensen
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