Muscle Naming & Attachments
This muscle is named for its fiber orientation and runs straight along the abdomen.
Rectus Abdominis
The deltoid is innervated by this nerve.
axillary nerve
The group of four muscles that extend the knee.
quadriceps femoris
This deep cheek muscle helps with chewing and blowing.
buccinator
The nerve responsible for innervating the diaphragm.
phrenic nerve
Name a muscle that named by the number of heads at the origin.
Biceps brachii or triceps brachii
This muscle flexes the elbow and inserts on the ulna.
brachilialis
These posterior thigh muscles are innervated by the sciatic nerve.
hamstrings (biceps femoris, semitendinosus, semimembranosus)
What nerve innervates all muscles of facial expression?
facial nerve
The anterior forearm muscles are flexors innervated by this nerve.
median nerve
These sheet-like tendons connect muscle to broad surfaces
aponeurosis
What movement does the biceps brachii perform besides elbow flexion?
supination of the forearm
The gluteal muscles are innervated by this group of nerves.
gluteal nerves
The masseter and temporalis are part of this muscle group.
muscles of mastication
A muscle that stabilizes during posture likely uses what type of contraction?
isometric contraction
This part of the muscle is more moveable and often pulled toward the stable part.
distal attachment
These muscles attach to the lateral epicondyle and extend the wrist.
posterior forearm muscles
What is the main action of the gastrocnemius and soleus
plantar flexion
This trunk muscle group is responsible for extending the spine.
erector spinae group
If the quadriceps femoris is paralyzed, this motion is impaired.
knee extension
Name a muscle that is named based off of their attachments points.
sternocleidomastoid
What is the common innervation of the triceps brachii?
radial nerve
Damage to the deep fibular (peroneal) nerve would affect this movement.
dorsiflexion of the foot
What is the orientation of the lateral pterygoid muscle?
horizontal
Carpal tunnel syndrome results from compression of this nerve.
median nerve