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Based on the picture below describe the different criteria that contribute to how skeletal muscles are named.

Based on the picture below describe the different criteria that contribute to how skeletal muscles are named.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Based on the picture below describe the different criteria that contribute to how skeletal muscles are named.

Naming of Muscles Muscles are named on the basis of several criteria (Fig. 41). These are the following: • Shape of the muscle. For example, the deltoid is a large, triangular-shaped muscle that covers the shoulder. It is so-named because the Greek letter delta is a triangle. Location of the muscle. For example, the frontalis musele is located on top of the frontal bone of the skull. Other examples are muscles of the arm that include the term brachii (of the arm). Relative size of the muscle. For the buttocks, the size of the muscles influences the names: gluteus maximus (largest), gluteus medius (medium), and the gluteus minimus. (smallest). Another example are the pectoral muscles including major or minor. Names are often used to indicate length-brevis (short), longus (long). Positions relative to the midline. Example: lateralis (to the outside away from the midline), and medialis (toward the midline). The direction of the muscle fibers. For example, the abdominal muscles all indicated the direction of the fibers such as the rectus (straight), the obliques (at an angle) and the transverse (horizontal) muscles of the abdomen. Number of muscles in a group. One example of this is the quadriceps, a group of four muscles located on the anterior (front) thigh. Number of origins. Example is the biceps brachii. The prefix bi indicates that the muscle has two origins and tri indicates three origins. Location of the muscle's origin and insertion. For instance, the sternocleidomastoid muscle of the neck has a dual origin on the sternum (stermo) and clavicle (cleido), and it inserts on the mastoid process of the temporal bone. Action of the muscle. Some examples are flexors (decrease the angle at the joint), extensors (increase the angle at the joint), abductors (move the bone away from the midline), or adductors (move the bone toward the midline).
Transcribed Image Text:Naming of Muscles Muscles are named on the basis of several criteria (Fig. 41). These are the following: • Shape of the muscle. For example, the deltoid is a large, triangular-shaped muscle that covers the shoulder. It is so-named because the Greek letter delta is a triangle. Location of the muscle. For example, the frontalis musele is located on top of the frontal bone of the skull. Other examples are muscles of the arm that include the term brachii (of the arm). Relative size of the muscle. For the buttocks, the size of the muscles influences the names: gluteus maximus (largest), gluteus medius (medium), and the gluteus minimus. (smallest). Another example are the pectoral muscles including major or minor. Names are often used to indicate length-brevis (short), longus (long). Positions relative to the midline. Example: lateralis (to the outside away from the midline), and medialis (toward the midline). The direction of the muscle fibers. For example, the abdominal muscles all indicated the direction of the fibers such as the rectus (straight), the obliques (at an angle) and the transverse (horizontal) muscles of the abdomen. Number of muscles in a group. One example of this is the quadriceps, a group of four muscles located on the anterior (front) thigh. Number of origins. Example is the biceps brachii. The prefix bi indicates that the muscle has two origins and tri indicates three origins. Location of the muscle's origin and insertion. For instance, the sternocleidomastoid muscle of the neck has a dual origin on the sternum (stermo) and clavicle (cleido), and it inserts on the mastoid process of the temporal bone. Action of the muscle. Some examples are flexors (decrease the angle at the joint), extensors (increase the angle at the joint), abductors (move the bone away from the midline), or adductors (move the bone toward the midline).
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