The Muscles Group Part 2

 

As previously mentioned, there are different groups of muscles, thus discussion shall be continued here.

Biceps brachii   / bahy-seps   brak-ee-ahy / n. The biceps or biceps brachii (Latin: musculus biceps brachii, "two-headed muscle of the arm") is a large muscle that lies on the front of the upper arm between the shoulder and the elbow.

Gym term: biceps

Biceps brachii is one of the main muscles of the upper arm which acts on both the shoulder joint and the elbow joint. It derives its name from the fact that it consists of two parts (heads).

Both heads:

Actions of Biceps Brachii:

a. Flex the arm (weakly) at the shoulder.

* (Both heads also flex & supinate the forearm at the elbow).

b. Flexes forearm at the elbow.

c. Supinates forearm at the elbow.

The triceps brachii is a large, thick muscle on the dorsal part of the upper arm. It often appears in the shape of a horseshoe on the posterior aspect of the arm. The main function of the triceps is the extension of the elbow joint.

The Triceps brachii gets its name with tri referring to "three" muscle heads or points of origin (with Brachii referring to the arm). These include the: Medial head; Lateral head; Long head

The main function of triceps brachii is an extension of the forearm at the elbow joint. In addition, its long head contributes to the extension and adduction of the arm at the shoulder joint. Besides movement, the triceps brachii also plays a role in creating anatomical spaces which are traversed by neurovascular structures. This makes the triceps brachii muscle an important surgical landmark. 

The latissimus dorsi is a large, flat muscle covering the width of the middle and lower back. It connects the bone of the upper arm to the spine and the hip. This muscle is often referred to as the lats.

The latissimus dorsi is used in everyday activities, including:

• expanding the chest for breathing
• pushing against the armrests of a chair to stand

It is also used during sports or workouts that feature:

• weightlifting with the upper body
• rowing
• throwing
• performing bench-presses

The latissimus dorsi is the principal muscle involved in swimming the freestyle/crawl stroke. For this reason, it is sometimes referred to as “the swimmer’s muscle” and is usually very well developed in swimmers.

Resources:

https://en.wikipedia.org/wiki/Biceps

https://www.getbodysmart.com/arm-muscles/biceps-brachii

https://www.physio-pedia.com/Triceps_brachii

https://www.kenhub.com/en/library/anatomy/triceps-brachii-muscle

https://www.kenhub.com/en/library/anatomy/latissimus-dorsi-muscle

https://www.medicalnewstoday.com/articles/321623#causes

https://learnmuscles.com/glossary/latissimus-dorsi-lat-4/