Muscular System Flashcards
adductors
Located at the medial side of each thigh (inner thigh). They press thighs together.
biceps brachii
Muscle in the forearm. Located in Radius side. Prime mover for the flexion of the forearm.
biceps femoris
Located in the hamstring, help flex knee and extend hip.
buccinators
Located in the mouth. Compresses the cheek against the teeth.
deltoid
Located in the shoulder. Three types: anterioir, medial, and anterior delt. Help stabilize shoulder joint, move shoulder in different directions.
extensors
muscles that increase angle of joints (aka straighten).
external intercostals
Found in the ribs (intercostals). Pull down on rib cage, then push air out of lungs.
external oblique
Muscle of the anterior abdominal wall. Helps twist and rotate abs.
fibularis longus
lateral part of lower leg. Plantar flexes and everts the foot.
flexors
Muscles that decrease angle of the joint, such as bending.
frontalis
two large fan-like muscles that extend from the eyebrow region to the top of the forehead. Facial expressions and eyebrow movement.
gastrocnemius
the chief muscle of the calf of the leg, which flexes the knee and foot. It runs to the Achilles tendon from two heads attached to the femur.
gluteus maximus
the main extensor muscle of the hip in humans. It is the largest and outermost of the three gluteal muscles
gluteus medius
Located between maximus and minimus. Prime mover of abduction at the hip joint.
internal oblique
a muscle found on the lateral side of the abdomen. Lower part of oblique. Flexes, laterally flexes, and rotates trunk
latissimus dorsi
a large flat muscle in the lower thorax. Pull the inferior angle of the scapula in various directions
masseter
inserts along the angle and lateral surface of the mandibular ramus. responsible for the action of mastication (chewing).
orbicularis oculi
Located around eyes. plays a key role in closing the eyelids and thus protecting the cornea from damage. Facial expression.
orbicularis oris
a muscle that is responsible for pulling the lip tissue centrally, allowing for actions such as eating, drinking, whistling.
pectoralis major
flexion, adduction, and internal rotation of the humerus.
rectus abdominus
Your rectus abdominis hold your internal organs in place and keep your body stable during movement. Abdominal wall.
rectus femoris
part of the quadriceps group. It is a bulk of muscle located in the superior, anterior middle compartment. Helps with flexion.
sartorius
move the hip joint and the knee joint, but all of its actions are weak, making it a synergist muscle. At the hip, it can flex, weakly abduct, and laterally rotate the femur.
semimembranosus
one of a group of muscles called the Hamstrings. It is located on the posteromedial side. Extends (straightens) the hip joint
semitendinosus
one of the three muscles that make up the hamstrings muscle group. extend at the hip and flex at the knee.
soleus
below your knee, runs down your lower leg and connects to your Achilles tendon above your heel. Involved in standing and walking.
sternocleidomastoid
a powerful neck muscle that allows you to bend your neck and turn or tilt your head.
temporalis
a muscle of mastication (chewing). It is located on the lateral aspect of the skull.
tibialis anterior
a muscle of the anterior compartment of the lower leg. dorsiflexes the foot at the talocrural joint and inverts it at the subtalar joint.
trapezius
a large superficial back muscle that resembles a trapezoid. Stabilize and move the scapula.
triceps brachii
dorsal part of the upper arm. shape of a horseshoe. extension of the elbow joint.
vastus lateralis
one of the four quadriceps muscles and is the largest muscle of that group. Lateral side. Extend the lower leg and allow the body to rise up from a squatting position.
vastus medialis
a teardrop-shaped muscle that helps extend the knee and stabilize the kneecap.
zygomaticus
quadriceps
Anterior side of upper thigh leg.
hamstring
Posterior side of upper leg.
