4Chapter_Anatomy_Digit_Hand_and_Wrist_RADR1311_Accessible_Summer2020_SC(2)(1) (4).pdf

Anatomy Digits, Hand and Wrist Hand & Wrist 27 bones on each hand and wrist Phalanges (fingers and thumb) Metacarpals (palm) Carpals (wrist) Phalanges (Digits) Each thumb and finger is called a digit Each digit consist of 2-3 phalanges Digits are numbered 1-5 laterally Thumb = 1st digit Phalanges (D...

Anatomy Digits, Hand and Wrist Hand & Wrist 27 bones on each hand and wrist Phalanges (fingers and thumb) Metacarpals (palm) Carpals (wrist) Phalanges (Digits) Each thumb and finger is called a digit Each digit consist of 2-3 phalanges Digits are numbered 1-5 laterally Thumb = 1st digit Phalanges (Digits) 14 phalanges in each hand 3 phalanges = digits 2-5 (proximal, middle and distal) 2 phalanges = digit 1 (proximal and distal) 3 parts to each phalanx Head Body (shaft) Base Metacarpals 5 metacarpals in each hand 3 parts to each metacarpal Head Body (shaft) Base Metacarpals are numbered 1-5 laterally Joints of the Hand and Wrist 9 Interphalangeal Joints 5 Metacarpophalangeal joint 5 Carpometacarpal joints Joints of the Hand and Wrist Joints of the Hand and Wrist DIP distal interphalangeal joint PIP proximal interphalangeal joint IP interphalangeal joint MCP metacarpophalangeal joint CMC Carpometacarpal joints Carpals – Posterior View 8 carpals Left wrist Hand is supinated Trapezium is near the 1st digit, thumb side 2 rows of carpals Distal Proximal Carpals – Anterior View Left hand Hand is pronated Trapezium is near the 1st digit, thumb side 2 rows of carpals Distal Proximal Capitate - largest Hamate - hamulus process Mnemonic for Carpal Bones Steve Left the Party To Take Carol Home Proximal Row Scaphoid (Navicular) Lunate (Semilunar) Triquetrum (Triangular) Pisiform Distal Row Trapezium (Greater Multangular) Trapezoid (Lesser Multangular) Capitate (Os magnum) Hamate (Unciform) Radiocarpal Joint Synovial (Diarthrodial) Ellipsoidal (Condyloid) PA Wrist Radiographic Anatomy Wrist Movements Ulnar Deviation Scaphoid Radial Deviation Lunate Triquetrum Pisiform Hamate Radial Deviation Radiographic Anatomy Ulnar Deviation Radiographic Anatomy Carpal Sulcus (Carpal Canal) Radiographic Anatomy Fat Pads AKA fat bands or fat stripes Radiolucent- can be difficult to see on a radiograph Visualization requires optimum exposure Displacement of a fat pad may be the only indication of disease of injury within the joint region PA A. Scaphoid Fat Pad B. Pronator Fat Pad PA Oblique Lateral