Lecture 11: Muscles Flashcards
What are the functions of facial muscles?
expressing emotion, speech, and mastication
Orbicularis oculi function?
closes the eyelid
Orbicularis oris function?
closes the lips and purses the lips
Occipitofrontalis function?
Occipitofrontalis has 2 bellies: frontal and occipital belly.
Frontal belly: raises eyebrows and wrinkles forehead
Occipital belly: raises hair
What connects the bellies of the occipitofrontalis?
epicranial aponeurosis
What are the muscles that move the mandible?
Platysma, masseter, and temporalis
Platysma function?
permits frowning and depresses the mandible
Masseter and temporalis function?
elevate the mandible: close the jaw
sternocleidomastoid origin and insert?
originates - manubrium
inserts - temporal bone
Sternocleidomastoid function?
rotates the head, extend the head at the atlanto-occipital joint
function of the abdominal muscles?
protect the abdominal viscera and move the vertebral column
layers of abdominal muscles?
external oblique(superficial), internal oblique(intermediate), and transversus abdominis(deepest)
rectus abdominis?
rectus abdominis runs parallel to the midline. it is divided by tendinous intersections. responsible for the definition of 6-8 pack
what does the diaphragm do?
permits breathing
muscles that move the pectoral girdle and their functions?
serratus anterior, trapezius
serratus anterior: abducts the scapula, assists in pushing and punching
trapezius muscle: permits rotation, adduction, depression, stabilization RADS of the scapula
Muscles that move the upper limb?
pectoralis major, deltoids, and latissimus dorsi
Function of the muscles that move the upper limb?
move the humerus
pectoralis major function?
move the humerus, permit AMF of the arm: adduction, medial rotation, and flexion
deltoid function?
move the humerus, permit AMF of the arm: ABduction, medial/lateral rotation, and flexion/extension
Latissimus dorsi function?
- swimmers muscle
- EAM: extension, adduction, medial rotation
muscles that move the forearm?
biceps brachii, triceps brachii, brachioradialis,
biceps brachii function?
FS: flexion of the arm at elbow joint and supination of hand
triceps brachii function?
extension of the arm at elbow joint
brachioradialis function?
- flexes the arm at the elbow joint
- controls speed of movement
- supinates and pronates the hand
FSP
muscles that move the lower limbs?
gluteus maximus, gluteus medius, semitendinosus, biceps femoris, semimembranosus, rectus femoris, vastus intermedius, vastus lateralis, vastus medialis
function of the muscles that move the lower limb?
the gluteal muscles function to move the femur
gluteus maximus function?
- largest muscle of the body
- extension of the leg at the hip joint
- lateral rotation of the femur at the hip joint
EL
gluteus medius function?
- it is deep to the gluteus maximus
- AM: abduction and medial rotation of the femur
what muscles are included in the “hamstrings” and functions?
semitendinosus, biceps femoris, and semimembranosus
- flexion of the the distal lower limb at the knee joint
- extend the leg at the hip joint
quads muscles and functions?
- rectus femoris, vastus intermedius, vastus lateralis, vastus medialis
- extension of the distal lower limb at the knee joint
- flexion of the leg at the hip joint
gracilis
- AMF
- adduction of the thigh at the hip
- medial rotation of the thigh
- flexion of the leg around the knee joint
muscles that move the foot?
soleus function?
permits plantar flexion of the foot at the ankle joint
gastrocnemius function?
PF
plantar flexion of the foot at the ankle joint
flexion of the lower limb at the knee joint
tibialis anterior function
dorsiflexion of the foot at the ankle joint
supination of the foot at intertarsal joints
