From the 14th century on, Roman numerals began to be replaced in most contexts by more convenient Hindu-Arabic numerals; however, this process was gradual, and the use of Roman numerals in some minor applications continues to this day.
Triceps Brachii Muscle (Lateral Head). The lateral head of the triceps brachii muscle is a muscle of the back of the arm, originating from the back of the humeral shaft and inserting at the elbow.The triceps brachii has three heads (connective immovable muscle) and is the only muscle on the back of the upper arm.lick to read more below. The lateral head of the triceps brachii muscle is a muscle of the back of the arm, originating from the back of the humeral shaft and inserting at the elbow.
The tricep muscles run from your shoulder, down the back of your arm, to your elbow joint. These muscles are called triceps because the muscle group consists of three heads: the long head, the lateral head and the medial head. This muscle group is responsible for extending, or straightening, the elbow joint.