Upper Extremities Anatomy

Merrill's Atlas - CH 5

Which row of carpals articulates with the ulna?

proximal row

What is the scaphoid?

largest carpal bone in the proximal row

What is the lunate?

crescent - shaped carpal bone in the proximal row

What does the lunate articulate with?

radius

What is the triquetrum?

pyramidal carpal bone in proximal row

What does the triquetrum articulate with?

hamate

What is the pisiform?

pea - shaped carpal bone in proximal row

Where is the pisiform located?

in front of the triquetrum

What is the trapezium?

carpal bone in the distal row, with a groove on its anterior surface

Where is the trapezium?

above the scaphoid

What is the trapezoid?

carpal bone in the distal row

Where is the trapezoid?

between the trapezium and hamate

What is the hamate?

wedge - shaped carpal bone in the distal row

What is the capitate?

largest and most central carpal bone

What does the capitate articulate with?

base of the 3rd metacarpal

What are joints between phalanges called?

interphalangeal (IP) joints

What type of joints are interphalangeal (IP) joints?

synovial, hinge - type

What are joints between phalanges and metacarpals called?

metacarpophalangeal (MCP) joints

What type of joints are metacarpophalangeal (MCP) joints?

synovial, ellipsoidal type

What are joints between carpal bones and metacarpals called?

carpometacarpal (CMC) joints

What type of joint is the 1st carpometacarpal (CMC) joint?

synovial, diarthrotic, saddle type

What type of joints are the 2nd - 5th carpometacarpal (CMC) joints?

synovial, gliding type

What are joints in between carpal bones called?

intercarpal joints

What type of joints are intercarpal joints?

synovial, diarthrotic, gliding type

What joint is formed by articulating the carpals with the distal radius?

radiocarpal joint

What carpal bones articulate with the distal radius specifically?

scaphoid, lunate, triquetrum

What type of joint is the radiocarpal joint?

synovial, diarthrotic, ellipsoidal type

Where is the ulna located in the anatomic position?

medial to the body

Where is the radius located in the anatomic position?

lateral to the body

What joints compose the elbow joint?

proximal radioulnar, humeroulnar, and humeroradial joints

What type of joints are both the humeroulnar and humeroradial joints?

hinge - type

What type of joint is the proximal radioulnar joint?

pivot - type

What joint forms by articulating the head of the humerus with the scapula?

shoulder joint