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Muscles 1st Quiz Liz

Liz's 1st Muscle Quiz (O,I,A)

QuestionAnswer
Slack Passively do the muscle action.(You do it for them)
Stretch Perform actions that are opposite the muscle's acton.
Agonist or Prime Movers The muscle that is STRONGER in a given action at a given joint Active Muscle (strongest muscles)
Synergist A muscle that ASSIST the agonist in a given action at a giving joint; Usually weaker than the agonist Active Muscle
Antagonist Muscle capable of performing the OPPOSITE action to that of the agonist (& its synergists)Passive Muscle
Fixator These muscles STABILIZE the joint during movement.
Flexors Muscles that cross the long axis of a joint anteriorly (except knee, which crosses the joint posteriorly) will most likely flex that joint.
Extensors Muscles that cross a joint posteriorly (except knee, which crosses the joint anteriorly)
Abductors muscles that cross a joint laterally
Abbuctors muscles that cross a joint medially
Rotators muscles that cross a joint obliquely
Isotonic (same tension)-length of muscles changes during contraction. 2 types
Isotonic Contraction Concentric - muscle SHORTENS during contraction- insertion moves towards origen (or vice versa)
Isotonic Contraction Eccentric muscles LENGHTENS during contraction- origen and insertion move further apart
Isometric muscle length does not change
Iliacus Origin Iliac fossa of os coxa
Iliacus Insertion lesser trochanter of the femur
Iliacus Action Prime Mover: flexion Synergist: lateral rotation Posture muscle - hypertonic anterior pelvic tilt
Psoas Major Origin T-12 - L-5 vertebral bodies and transverse processes
Psoas Major Insertion Lesser trochanter of femur
Psoas Major Action Prime Mover; Flexion Synergist; lateral rotation Posture Muscle- hypertonic lardosis
Rectus Femoris Origin Anterior Inferior Iliac Spine (AIIS)
Rectus Femoris Insertion patella to the tibial tuberocity of the tibia
Rectus Femoris Action Prime mover; knee extention Synergist; hip flexion
Sartorius Origin Anterior Superior Iliac Spine (ASIS)
Sartorius Insertion Proximal, anterior, medial tibial shaft (pes anseric=foot of goose)
Sartorius Action Hip synergist; flexion, abduction, lateral rotation Knee synergist; flexion, medial rotation
Tensor Fascia Latae Origen posterior(or lateral) to ASIS (just under lip of the iliac crest)
Tensor Fascia Latae Insertion Iliotibial band to the anterior, lateral tibial condyle (gerdy's tubercle)
Tensor Fascia Latae Action Hip synergist; flexion, abduction, medial rotation. Knee synergist; extention Fixator of knee
Gluteus Maximus Origen posterior gluteal lines, posterior, lateral sacrum to sacrotuberous ligament (gluteal fold)
Gluteus Maximus Insertion ilitibial band to anterior, lateral tibial condyle and the gluteal tuberocity
Gluteus Maximus Action Hip Prime mover; Ext, Hyperextention Synergist; abduction, adductionFixator; knee jt
Biceps Femoris Origen Long head; ischial tuberocity of os coxa Short head; mid-lateral lineas aspera of femur
Biceps Femoris Insertion head of fibula
Biceps Femoris Action Hip: PM- extention, hyperextention SYN- lat rotation Knee: PM- flexion SYN-lateral rotation
Semitendinosus Origen Ischial tuberocity of os coxa
Semitendinosus Insertion proximal, anterior, medial tibil shaft
Semitendinous Action Hip: PM- extention, hyperextention SYN- lat rotation Knee: PM- flexion SYN-lateral rotation
Semimembranosus Origen Ischial Tuberocity
Semimembranosus Insertion medial, posterior, tibial condyle
Semimembranosus Action Hip: PM- extention, hyperextention SYN- lat rotation Knee: PM- flexion SYN-lateral rotation
Created by: 1636851386
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