Brachialis is a muscle located in the upper arm. The spelling of this word is derived from the root brachium, which is the Latin term for arm. The correct pronunciation of Brachialis is [bɹəˈkaɪliəs], with stress on the second syllable. The first sound is a voiced bilabial fricative [b], followed by a schwa [ə]. The second syllable contains a voiceless velar plosive [k], a diphthong [aɪ], and a liquid sound [l]. Finally, the last syllable consists of a short i sound [ɪ] and a long e sound [əs].
The "brachialis" is a term used to refer to a specific skeletal muscle located in the upper arm. It is one of the major muscles that contributes to the flexion of the elbow joint. The word "brachialis" is derived from the Latin word "brachium," which means "arm," indicating its location and function.
Anatomically, the brachialis muscle lies deep to the biceps brachii muscle and is situated on the anterior aspect of the humerus bone. It begins from the lower half of the humerus and extends downwards, attaching to the ulna bone in the forearm. Its position allows it to exert a significant force on the ulna bone during elbow flexion, making it an important muscle for performing tasks such as lifting and carrying objects.
The brachialis is characterized by its fusiform shape, meaning it is wider in the middle and tapered at the ends. It is commonly known as the "workhorse" muscle of the upper arm due to its strong contractile capabilities. Its unique position and structure enable it to generate considerable force during elbow flexion, even surpassing the biceps brachii muscle. This makes the brachialis vital for developing overall arm strength and stability.
In addition to its role in elbow flexion, the brachialis muscle also contributes to forearm pronation (rotation of the palm facing down) when forceful movements are involved. Overall, the brachialis muscle plays an integral role in upper limb movements, specifically in bending the elbow, generating power, and providing stability to the elbow joint.
See under musculus.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The word "brachialis" is derived from the Latin term "brachium", which means "arm". The suffix "-alis" is a Latin suffix used to denote "pertaining to". Therefore, "brachialis" literally means "pertaining to the arm". The term "brachialis" is used in anatomy to refer to a muscle located in the upper arm that flexes the elbow joint.