Brachioradialis Muscle Anatomy

Origin Lateral supracondylar ridge (humerus)
Insertion Lateral surface of the styloid process (radius)
Action Flexion of the forearm at the elbow
Supination and pronation of the forearm
Nerve Radial nerve (C5, C6, C7)
Artery Radial recurrent artery

Location & Overview

The brachioradialis is located in the lateral side of the forearm and crosses the elbow joint. It is a superficial forearm muscle which is able to be palpated in the anterolateral forearm. It also contributes to the border of the cubital fossa forming one of the lateral boundaries along with the wrist extensors. The cubital fossa is the collation of important structures such as the biceps tendon, brachial artery and median nerve [1] [2].

brachioradialis muscle

Here we can see an isolated view of the brachioradialis muscle.

brachioradialis muscle from a superficial view

Here we can see the brachioradialis muscle from a superficial view. It is highlighted in green amongst the other muscles of the arm.

Origin & Insertion

The brachioradialis originates across the proximal two-thirds of the humerus’s lateral supracondylar ridge. Distally, it inserts onto the lateral surface of the radius’s styloid process [3] [4].

origin of the brachioradialis muscle

Highlighted in red is the origin of the brachioradialis muscle on the lateral supracondylar ridge of the humerus.

insertion of the brachioradialis muscle

Highlighted in blue is the insertion of the brachioradialis muscle on the lateral surface of the styloid process.


The primary action of the brachioradialis is flexing the forearm at the elbow. It is also able to supinate or pronate depending on the rotation/orientation of the forearm. When the forearm is in a pronated position, the brachioradialis assists in supination as it contracts. When the forearm is in a supinated position, the brachioradialis assists in pronation as it contracts [5].


The primary action of the brachioradialis is flexion at the elbow joint. Therefore exercises involving flexion with the forearm in a pronated or hammer grip are going to target the brachioradialis most. Exercise examples would be: reverse curls (barbell, dumbbell, ez bar, or even kettlebell), hammer grip curls, or cable curls using the rope attachment.


The brachioradialis muscle is innervated by the radial nerve (C5, C6, C7). The spinal nerve roots of C5 and C6 are the nerve roots which provide the primary innervation of the brachioradialis [6] [7] [8] [9].

Blood Supply

Blood is supplied to the brachioradialis muscle via the radial recurrent artery which is a branch of the radial artery [10] [11].

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Brachioradialis Flashcards


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