Muscle Names

Question 1

naming of muscles

Answer 1

• origin (where muscle begins - least movable attachment)
• insertion (where muscle ends - most movable attachment)
• action - flexion or extension
• location on body or organ it is near
• fiber direction
• number of divisions
• size or shape

Question 2

muscles of the head (not shown)

Answer 2

• frontalis muscle is in the forehead, it raises and lowers the eyebrows
• temporalis muscle moves lower jaw up and back to close the mouth
• masseter muscle, moves lower jaw up to close the mouth when chewing

Question 3

muscles of the neck

Answer 3

Sternocleidomastoid muscle helps bend the neck and rotate the head; names for two points of origin - the sternum (stern/o) and clavicle (cleid/o) and the point of insertion, the mastoid process

Question 4

muscles of the abdomen (named for fiber direction)

Answer 4

• rectus abdominis, fibers are in straight alignment with vertical plane of the body. “six pack muscle” lies beside midline
• external oblique and internal oblique have slanted alignments (opposite directions from the other)
• transverse abdominis has crosswise alignment

Question 5

muscle j

Answer 5

quadriceps femoris

Question 6

muscle p

Answer 6

trapezius

Question 7

muscle N

Answer 7

pectoralis major