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Muscles 2nd Quiz Liz

Liz's 2nd Muscle Quiz (O,I,A)

QuestionAnswer
Slack Passively do the muscle action.(You do it for them)
Antagonist Muscle capable of performing the OPPOSITE action to that of the agonist (& its synergists)Passive Muscle
Synergist A muscle that ASSIST the agonist in a given action at a giving joint; Usually weaker than the agonist Active Muscle
Agonist or Prime Movers The muscle that is STRONGER in a given action at a given joint Active Muscle (strongest muscles)
Stretch Perform actions that are opposite the muscle's action.
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
Adductors 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
Gluteus Medius Origin Anterior, superior gluteal line(back of ilium between crest)
Gluteus Medius Insertion outer surface of greater trochanter (lat
Gluteus Medius Action PM:(all fibers) AbductionAnterior Fibers SYN: flexion, medial rotationMiddle fibers Strong abductors Posterior fibers hyperextention, lateral rotation. FIXATOR @ Hip joint
Gluteus Minimus Origin Inferior gluteal line(btwn middle & inferior curved lines of ilium)
Gluteus Minimus Insertion front of greater trochanter (anterior)
Gluteus Minimus Action SYN: abduction, flexion, medial rotation
Piriforms (6 deep lateral rotators) Origin anterior, sacrum (exits the greater sciatic notch)
Piriforms Insertion Superior (top) great trochanter
Piriforms Action SYN: lateral rotation and abduction
Glemellus Superior (6 deep lateral rotation)Origen ischium and pubis
Glemellus Superior Insertion greater trochanter; inferior to piriformis
Glemellus Superior Action SYN: lateral rotation
Obturator Internus (6 deep lateral rotation) Origin ischium and pubis
Obturator Internus Insertion greater trochanter; inferior to piriformis
Obturator Internus Action SYN: lateral rotation
Glemellus Inferior (6 deep lateral rotation) Origin ischium and pubis
Glemellus Inferior Insertion greater trochanter; inferior to piriformis
Glemellus Inferior Action SYN: lateral rotation
Obturator Externus (6 deep lateral rotation) Origin ischium and pubis
Obturator Externus Insertion greater trochanter; inferior to piriformis
Obturator Externus Action SYN: lateral rotation
Quadratus Femoris (6 deep lateral rotation)Origin Ischial tuberocity
Quadratus Femoris Insertion greater trochanter- inferior to GOGO's
Quadratus Femoris Action SYN: lateral rotation (pulls)Adduction
Pecitineus Origin superior ramus of the pubis of os coxa
Pecitineus Insertion inferior & lateral to lesser of femur
Pecitineus Action SYN: adduction & flexion
Adductor Longus Origin Body of pubis (anterior)
Adductor Longus Insertion mid-medial lineas aspera of femur
Adductor Longus Action PM; Adduction SYN: Flexion, lateral rotation
Adductor Longus Origin Body of pubis of os coxa
Adductor Longus Insertion proximal, medial, linea aspera of femur
Adductor Longus Action PM; Adduction SYN: Flexion,
Adductor Magnus Origin Body of pubis, inferior ramus of pubis, to ramus of ishium to the ishial tuberocity
Adductor Magnus Insertion length of the medial linea aspera to the addutor tubercle of femur
Adductor Magnus Action PM:Adduction (middle fibers) SYN:flex,lateral rotation, (anterior fibers) extension, hyperextention, medial rotation (posterior fibers)
Gracilis Origin body of pubis
Gracilis Insertion proximal, anterior, medial, tibial, shaft (pes aserine)
Gracilius Action Hip SYN: adduction, flexion w/extended knee Knee SYN: flexion, medial rotation
Vastus Medial Origin medial linea aspera of femur
Vastus Medial Insertion patella to tibial tuberocity of tibia
Vastus Medial Action PM: knee extention
Vastus Latralis Origin lateral linea aspera, inferior greater trochanter
Vastus Latralis Insertion patella to tibial tuberocity of tibia
Vastus Latralis Action PM: knee extention
Vastus Intermedius Origin anterior, lateral shaft of femur
Vastus Intermedius Insertion patella to tibial tuberocity of tibia
Vastus Intermedius Action PM: knee extention
Gastrocnemius Origin medial and lateral condyles of femur (superior aspect)
Gastrocnemius Insertion archilles tendon to calcaneus
Gastrocnemius Action Knee SYN: flexion Ankle PM: planterflexion
Popliteus Origin lateral condyle of femur
Popliteus Insertion posterior, medial of tibia
Popliteus Action SYN: medial rotation to unlock the knee, flexion
Plantaris Origin lateral supracondyle ridge of femur
Plantaris Insertion archilles tendon to calcaneus
Plantaris Action SYN: knee flexion, Ankle plantaflextion
Created by: 1636851386
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