1. Naming Skeletal Muscles
Human Anatomy and Physiology

2. Naming Skeletal Muscles
Based on several criteria:
Direction of muscle fibers
Relative size of the muscle
Location of the muscle
Number of origins
Location of the muscle’s origin and insertion
Shape of the muscle
Action of the muscle

3. Naming Skeletal Muscles
Direction of Muscle Fibers
Rectus: straight
Oblique: slanted

7. Naming Skeletal Muscles
Relative size of muscle
Maximus: largest
Minimus: smallest
Longus: long

9. Naming Skeletal Muscles
Location of the muscle
Temporalis muscle overlies the temporal bone
Frontalis muscle overlies the frontal bone

11. Naming Skeletal Muscles
Number of origins
Biceps: two origins
Triceps: three origins
Quadriceps: four origins

13. Naming Skeletal Muscles
Location of the muscle’s orgin and insertion
Named for their attachment sites
Sternocleidomastoid muscle : origin on the sternum (sterno), the clavicle (cleido) and inserts on the mastoid process (mastoid) of the temporal bone

15. Naming Skeletal Muscles
Shape of the muscle
Deltoid muscle is triangular and deltoid means triangular

17. Naming Skeletal Muscles
Action of the muscle
Extensor: extensor muscles of the wrist an all extend the wrist
Adductor: adductor muscles of the thigh all bring about its adduction.