Anatomy of the Arm and Forearm

Arm and Forearm
Bone Elements of the Arm + Forearm
Humerus: Single bone in the arm

Have specialised surfaces for
joints at the lower end

Radius: Lateral bone of the forearm

Ulna: Medial bone of the forearm

Joints:

Humeroulnar joint: between
humerus and ulna

Humeroradial joint: between
Humerus and radius

Superior radioulnar joint: between
radius and ulna




Humerus
Upper end:
Greater and lesser tuberosities
(tubercles)

Intertubercular (bicipital) sulcus




Arm and Forearm 1

, Deltoid tuberosity:

Is a rough area where the
deltoid is attached to the
humerus




Lower end:
Lateral

Capitulum: small, round for the
radius

Medial

Trochlea: large, with a groove
for the ulna

⇒ Capitulum + Trochlea make up the
condylar area

Above the condylar area are the
epicondyles

Medial epicondyle

Above is the medial
supraepicondylar ridge

Lateral epicondyle

Above is the lateral
supraepicondylar ridge




Arm and Forearm 2