Lab 9: Gross Anatomy of the muscular system

How are muscles named?

by shape, size, location, and number of orgins

Tendons

strong bands of dense, regular connective tissue that connect muscles to bones

Insertion

moveable end of the muscle

Origin

stable end of the muscle

agonist

prime mover that can be assisted by a synergist

Synergist

type of muscle that can fixate or stabilize the bone

Antagonsts

type of muscle that helps maintain body posture and control fast movements of agonists

Buccinator

muscle that allows compression of the cheek as in blowing up a ballon

Frontalis

muscle that raises the eyebrow and makes creases in the forehead

Orbicularis Oculi

muscle that closes the eye

Orbicularis Oris

muscle that closes and puckers the lips

Platysma

muscle that lowers the lower lip

trapezius

muscle that lowers and elevates the scapula

zygomaticus

muscle that allows you to smile

origin is the zygomatic arch, insertion is the mandible

origin and insertion of the masseter

flexion of the head

movement provided by the splenius capitis

deltoid

the muscle responsible for flexion and extension, medial and lateral rotation of the arm

latissimus dorsi

the muscle that adducts and extends the arm

pectoralis major

the muscle that has the origin at the clavicle and insertion at the humerus

biceps brachii

the muscle that allows supination and flexion of the forearm

triceps

the arm muscle that has three points of origin and insertion on the ulna

flexor carpi radialis

the muscle responsible for flexion of the wrist and abduction of the hand

brachioradialis

the muscle that has the origin at the humerus distal shaft and insertion at the styloid process of the radius

extension of forearm

the movement of the triceps

adducts the thigh and flexes the leg

the movement of the gracilis

extension of the leg

the movement made by the quadriceps

extension, lateral rotation, and abduction of the thigh

the movement allowed by the gluteus maximus

biceps femoris

the muscle that has the origin of the femur and insertion on the fibula

calcaneal tendon

the tendon formed by the union of soleus and gastocnemius tendons

gastrocnemius

the muscle responsible for plantar flexion and flexion of the leg

tibialis anterior

the muscle that allows dorsiflexion and inversion of the foot