Trapezium

Carpal bone at the thumb base

Upper limbSkeletal system

High-yield

Saddle (carpometacarpal) joint with the 1st metacarpal allows thumb opposition; a common site of osteoarthritis.

Overview

A distal-row carpal bone forming the saddle joint with the thumb metacarpal that enables opposition.

Reference facts

Bone type
Short (carpal)
Key landmarks
Tubercle of trapezium; Saddle-shaped distal facet
Articulations
Scaphoid; 1st metacarpal; 2nd metacarpal; Trapezoid

✚

Educational reference. This page summarizes standard anatomy study concepts. It is not medical advice and must not be used for diagnosis, treatment, surgical planning, or any clinical decision-making.

Your notes

Region

Upper limb — Shoulder, arm, forearm, and hand — from the rotator cuff to the intrinsic hand muscles.

All upper limb structures

Study this

Reinforce the Trapezium with flashcards and quiz practice.

Flashcards Quiz

Scaphoid

Boat-shaped carpal bone

Bone

Lunate

Moon-shaped carpal bone

Bone

Radius

Lateral forearm bone

Bone

Ulna

Medial forearm bone

Vessel

Radial artery

Lateral forearm artery

Bone

Clavicle

Collarbone — the strut of the shoulder

AnatomyDeck

210 structures · 680 flashcards · quizzes. A study reference for human gross anatomy.

AnatomyDeck is an educational study reference for human anatomy coursework. It is not medical advice and is not a tool for diagnosis, treatment, surgical planning, or any clinical decision-making. Always defer to your instructors, dissection materials, current references, and licensed professionals.