Chapter 9: Muscles and Naming

Name of muscle after their location

1) biceps- brachi and branchialis 2) quadriceps femoralis 3) orbicularis orbis 4) rectus abdominis 5) gluteus maximus 6) pectoralis major

Name of muscles named after their action

1) flexor carpi ulnaris- flexor- flexes the wrist 2) extensor digitorium- extends the fingers 3) adductor longus- adducts the thigh 4) pronator teres- pronates the front arm 5) erector spinae- erects the spine (action usually first in name)

Name of muscles after their size

Used to name muscles that are similar to each other- differentiated by size gluteus maximus, medias, and minimus rhomboid major and minor

Muscles named after the number of heads

if muscles have more than one proximal attachment point ex) tricep, bicep, quadricep

Name of muscle after their fiber orientation and what the names mean

rectus- fibers in a straight line oblique- run at an angle oriculares- circular transversus- sideways plane ex) orbicularis oris- circular muscle around the eye transversus abdominus

Name of muscles after their shape

rhomboid major and minor quadraceps deltoid (triangular) trapezius

How are skeletal muscles named?

size, shape, length, location, direction of muscle fiber, attachment, number of attachments, action

Muscles named after their attachments

the attachments are what bones or bone features the muscle is connected to. ex) tibilis anterior- tibia on anterior surface ex) sternohyphoid- sternum/hypohoid bone