Anatomy Muscles Flashcards

Terms Definitions
Vastus
Great
Brachioradialis(insertion)
Radial styloid
Sternocleidomastoid
Location: Neck
Amphiarthrosis
Slightly moveable joint
Lumbar Aponeurosis
Location: Back
Coccygeus innervation
S4 and S5
Extensor Pollicis Brevis(innervation)
Radial nerve
Levator scapulae action
elevates the scapula
Depressor Labii Inferioris innervation
Facial nerve
Synovial Joint classificationUniaxial (2)
Hinge, Pivot
Pronator
Turns palm inferiorly or posteriorly
Flexor Digitorum Brevis action
Helps flex toes
Thick Filaments
Myosin-based filaments extending the entire length of the A band in the sarcomere.
Flexor carpi ulnaris
o-medial epicondylei-pisiform, hamate, metacarp 5a-flexion, adduction
NoseNasalisnasus= nose
Action- compresses bridge and depresses tip of nose; elevates corners od nostrilsInnervation- CN VII (facial nerve)
latissimus dorsi
adducts and extends upper arm/shoulder, rotates humerus medially
WHICH MUSCLES CLOSES THE EYE
7TH CRANIAL NERVE
Geniohyoid innervation
First cervical spinal nerve via hypoglossal nerve
gluteus maximus
extends and laterally rotates the thigh
Biceps femoris, long head
o-ischial tuberosity, linea asperai-lateral condyle, fibula heada-extension, lat rot; flex knee
MouthDepressor labii inferiorislabi=lipinfer= below
Action- draws lower lip inferiorlyInnervation- CN VII (facial nerve)
stabilizers or fixators
eliminates unwanted mvmts by stabillizing origin of prime mover
abdominal aponeuroses
tendons of various abdominal muscles that interlace at midline
MUSCLES OF THE ROTATOR CUFF
1. SUPRASPINATUS2. INFRASPINATUS3. SUBSCAPULARIS4. TERES MINOR
Mylohyoid action
Elevates hyoid bone and floor of mouth, enabling tongue to exert backward and upward pressure that forces food bolus into pharynx
Antagonist
Muscle that opposes the action of the prime mover/agonist.
extends knee, laterally rotates tibia, aids in abduction and medial rotation of femur; during standing, steadies pelvis on femoral head and steadies femoral condyles on tibia
tensor fasciae latae
elasticity
the ability to recoil and resume the original resting length
external oblique
origin is lower 8 ribs, compresses abdomen; most external of abdominal muscles
WHICH MUSCLE HELPS ONE DO THE LOTUS POSITION?
THE SARTORIUS
Geniohyoid origin and insertion
origin: Inner surface of mandibular symphysis; insertion: Hyoid bone
Extensor Carpi Radialis Brevis(insertion)
Base of 3rd metacarpal (dorsal surface)
fixators
muscles that fix a joint in a given position during the mvmt of other joints
Flexor digitorum superficialis
ACTION: Flexes phalanges of each finger
Flexor Digiti Minimi Brevis innervation
Lateral plantar branch of tibial nerve
quadratus lumborum o,i,a
o:iliac crest and lumbar fascia, i: tps of l1-3 mnargin of 12th rib, a: extends spine, posure, unilat: ipsilat flex
Cartilage: Cells, Matrix, Functions?
chondrocytes, matrix is high in gags and fibers variable, functions as shock absorption, flexibility, rigidity
2 types of isotonic contraction
concentric - muscle shortens as it does work, eccentric - muscle lengthens as it does work
skeletal muscle tissue properties
-attach to and covers skeletal bones - obvious stripes (striations) - voluntary (conscious control) - body motility - extremely adaptable
Splenius capitis and cervicis o, i, a
o: ligamentum nuchae, Sp of c7-t6, I: mastoid process of temporal bone, TP of C2 - 4 a: bilat: act as a grp to extend head, unilat: rot and ipsilat flex, n: cervical amd spinal nerves (dorsal rami)
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