Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
UAG - Upper Limb
UAG - Bones, Upper Limb
| Question | Answer |
|---|---|
| Upper Limb Major Segments | Shoulder, Arm, Forearm, Hand |
| Shoulder | proximal segment, overlaps trunk (thorax & back) & lower lateral neck: Pectoral, Scapular, & Deltoid regions |
| Pectoral (shoulder) Girdle | bony ring, incomplete posteriorly, formed by the scapulae and clavicles and completed anteriorly by the manubrium of the sternum |
| Arm | L. brachium; centered around Humerus, longest segment of the limb |
| Forearm | L. antebrachium; Radius & Ulna, second longest segment of limb |
| Hand | L. manus; Carpus, Metacarpus, & Phalanges; distal to the forearm (wrist, palm, dorsum of hand, and digits) |
| Clavicle (collar bone) | shaft=double curve/horizontal plane; medial half=convex anteriorly; sternal end=enlarged/triangular where it meets with manubrium of sternum; lateral half=concave; acromial end=flat where it meets with acromion of scapula |
| Clavicle (collar bone) Functions | 1. moveable/crane-like strut (rigid support) from which the scapula & free limb are suspended, limb has max ROM 2. bony boundary for cervico-axillary canal (neck/arm) to protect neurovascular supply 3.transmits shock from upper limb>axial skeleton |
| Scapula (shoulder blade) | triangular flat bone; posterolateral of thorax, overlying the 2nd-7th ribs; convex posterior surface w/bone ridge=spine-->small supraspinous fossa & large infraspinous fossa; concave coastal surface=supscapular fossa |
| Humerus (arm bone) | largest bone in upper limb; articulates w/ scapula @Glenohumeral joint & Radius/Ulna @elbow joint; head, surgical & anatomical necks, greater & lesser tubercles =proximal end; shaft=radial & deltoid; distal end=medial & lateral epicondyles |
| Ulna | can't pivot; stabilizing bone; medial & longer in forearm; w/humerus=olecranon (projects proximally from posterior for elbow) & coronoid process (projects anteriorly)>>form walls of trochlear notch; doesn't attach to wrist |
| Radius | pivots; lateral & shorter in forearm; proximal end=short head(concave),neck(constriction distal to head),& medially directed tuberosity(distal to medial neck) |
| Bones of the Hand | Carpal bones (proximal & distal rows), Metacarpals of the palm, & Phalanges of the fingers/digits |
| Carpus (wrist) | 8 bones; Proximal row (lat>med): Scaphoid, Lunate, Triquetrum, Pisiform Distal row (lat>med): Trapezium, Trapezoid, Capitate, Hamate |
| Scaphoid (G. skaphé, skiff, boat) | a boat-shaped bone that articulates proximally with the radius and has a prominent scaphoid tubercle; it is the largest bone in the proximal row of carpals |
| Lunate (L. luna, moon) | a moon-shaped bone between the scaphoid and the triquetral bones; it articulates proximally with the radius and is broader anteriorly than posteriorly |
| Triquetrum (L. triquetrus, three-cornered) | a pyramidal bone on the medial side of the carpus; it articulates proximally with the articular disc of the distal radio-ulnar joint |
| Pisiform (L. pisum, pea) | a small, pea-shaped bone that lies on the palmar surface of the triquetrum |
| Trapezium (G. trapeze, table) | a four-sided bone on the lateral side of the carpus; it articulates with the 1st and 2nd metacarpals, scaphoid, and trapezoid bones |
| Trapezoid | a wedge-shaped bone that resembles the trapezium; it articulates with the 2nd metacarpal, trapezium, capitate, and scaphoid bones |
| Capitate (L. caput, head) | a head-shaped bone with a rounded extremity and the largest bone in the carpus; it articulates primarily with the 3rd metacarpal distally and with the trapezoid, scaphoid, lunate, and hamate |
| Hamate (L. hamulus, a little hook) | a wedge-shaped bone on the medial side of the hand; it articulates with the 4th and 5th metacarpal, capitate, and triquetral bones; it has a distinctive hooked process, the hook of the hamate, that extends anteriorly |
| Metacarpus | skeleton of the palm, b/w carpus & phalanges; 5 metacarpal bones; metacarpal=base (proximal & articulate w/carpals), shaft & head (distal & articulate w/proximal phalanges & form knuckles); 1st=thumb (thick/short), 3rd=styloid process |
| Phalanges | 3 per digit except for thumb(2); has proximal base/large, shaft(body)/medium, & distal head/small |
Created by:
sgarcia31
Popular Anatomy sets