Menu Close

Biceps Brachii Muscle

(Sample Lesson)

Muscle Description

The biceps brachii ( L., musculus biceps brachii ) is a large muscle that lies on the front of the upper arm between the shoulder and the elbow. It has two heads that both arise on the scapula and join to form a single muscle belly, which attaches to the upper forearm. While the biceps brachii muscle crosses both the shoulder and elbow joints, its primary function is at the elbow, where it flexes the forearm and supinates the forearm.

Biceps brachii muscle
Biceps brachii muscle

(1125px X 1500px)

Terms of Use

Origin (  )

a. Long head: the supraglenoid tubercle of the scapula via a tendon that passes through the intertubercular groove of the humerus.

b. Short head: coracoid process of the scapula.

Biceps brachii origin: with muscle
Biceps brachii origin
origin-muscle-labeled-1.4
origin-labeled-1.4
previous arrow
next arrow

Labeled and Unlabeled Versions
(1125px X 1100px)

Terms of Use

Insertion (  )

a. Radial tuberosity.

b. Bicipital aponeurosis into deep fascia on the medial part of the forearm.

Biceps brachii insertion: bicipital aponeurosis
Biceps brachii insertion: muscle attached to radial tuberosity
Biceps brachii insertion: radial tuberosity
insertion-aponeurosis-labeled-1.4
insertion-tuberosity-muscle-labeled-1.4
insertion-tuberosity-labeled-1.4
previous arrow
next arrow

Labeled and Unlabeled Versions
(1125px X 1100px)

Terms of Use

Actions

a. Flexes the elbow (at the humeroulnar joint).
b. Supinates the forearm (at the radioulnar joint).
c. Flexes the shoulder (at the glenohumeral joint).

Flexion of the elbow (humeroulnar joint)
Supination of the forearm
Flexion of the shoulder (glenohumeral joint)
elbow-flexion-1.2
Flexion of the elbow
forearm-supination-1.2
Supination of the forearm
shoulder-flexion-1.2
Flexion of the shoulder
previous arrow
next arrow

Unlabeled Versions
(1125px X 1100px)

Terms of Use

Nerve Supply

a. Musculocutaneous nerve.
b. Nerve roots: C5, C6, and C7.

Biceps brachii nerve supply
Biceps brachii: nerve roots
nerve-supply-labeled-2.3
Nerve Supply
nerve-roots-labeled-2.3
Nerve Roots
previous arrow
next arrow

Labeled and Unlabeled Versions
(1125px X 1100px)

Terms of Use

Blood Supply

a. Brachial artery.

Biceps brachii blood supply

Labeled and Unlabeled Versions
(1125px X 1100px)

Terms of Use

Page Attributions

OpenStax, Anatomy and Physiology

Access for free athttps://openstax.org/books/anatomy-and-physiology/pages/1-introduction

Reference: “Muscles of the Pectoral Girdle and Upper Limbs

Wikipedia, the free encyclopedia.

Reference: “Biceps