1. Chapter 9: Muscular System
Naming Muscles

2. Direction of fascicles relative to midline
Examples
Rectus = parallel
transverse = perpendicular
oblique = 45 degree angle
Examples in Human
Rectus abdominis
Transversus Abdominis
External Oblique

3. Location (i.e. the bone or body part that a muscle covers)
Examples
Frontal Bone
Tibia
Examples in Human
Frontalis
Tibialis Anterior

4. Relative Size Examples in Human Palmaris Longus Peroneus Longus
Maximus = largest
Longus = longest
Brevis = shortest
Examples in Human
Gluteus Maximus
Palmaris Longus
Peroneus Longus

5. Number of Origins Examples in Human Example Biceps = 2 origins
Triceps = 3 origins
Examples in Human
Biceps Brachii
Triceps Brachii

6. Shape Examples in Human Example Deltoid = triangle
Trapezius = trapezoid
Serratus = saw-toothed
Orbicularis = circular
Examples in Human
Deltoid
Trapezius
Serratus Anterior
Orbicularis Oris

7. Location of Origin and/or Insertion
Example
Origin = sternum
Insertion = mastoid process
Examples in Human
Sternocleidomastoid

8. Action of Muscle Examples in Human Example Flexion Extension Adduction
Flexor carpi radialis
Extensor digitorum
Adductor longus