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30 terms

Isolated and Integrated Muscle Functions

fit-103 assignment.1.2
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Anterior Tibialis
front of shin, flexes ankle
Posterior Tibialis
just behind the medial malleoulus or ankle toward the midline of the body
Soleus
a broad flat muscle in the calf of the leg under the gastrocnemius muscle
Gastrocnemius
the muscle in the back part of the leg that forms the greater part of the calf, responsible for the plantar flexion of the foot
Peroneus Longus
Plantar flexion and eversion of foot; stabilizes the lateral ankle and arch of the foot
Biceps Femoris - Long Head
a muscle of the posterior (the back) thigh
Biceps Femoris - Short Head
flexes the leg at the knee, laterally rotates the leg when knee is flexed
Semimebranosus
Under the inner margin of the top of the tibia, flexes leg, extends thigh
Semitendinosus
Flexes leg at the knee and extends thigh at the hip; belongs to the hamstring group
Vastus Lateralis
extends and stabilizes knee
Vastus Medialis
Extends leg at the knee; part of the quadriceps group
Vastus Intermedius
Extends knee. O: Anterior and lateral surfaces of femoral shaft. I: Patella, tibial tuberosity, lateral and medial condyles of tibia.
Rectus Femoris
anterior inferior iliac spine; ilium, quadriceps tendon, extends knee; helps iliopsoas flex thigh at hip
Adductor Longus
Adducts and flexes thigh at the hip; assists in medial rotation
Adductor Magnus - Anterior Fibers
Origin: Posterior fibers: Ischial tuberosity Anterior fibers: Ramus of ischium and pubis Insertion: From a line extending from the gluteal tuberosity along the linea aspera, medial supracondylar line and adductor tubercle on medial condyle of femur. Isolated function: -Assists in concentric acceleration of femoral adduction, flexion and internal rotation. -The adductor magnus assists in concentric acceleration of hip extension. Integrated function: -Assists in dynamic stabilization of the lumbo-pelvic-hip complex during functional movements. -Assists in eccentric deceleration of femoral abduction, extension and external rotation. -The adductor magnus assists in eccentric deceleration of hip flexion.
Adductor Magnus - Posterior Fibers
Origin: Posterior fibers: Ischial tuberosity Anterior fibers: Ramus of ischium and pubis Insertion: From a line extending from the gluteal tuberosity along the linea aspera, medial supracondylar line and adductor tubercle on medial condyle of femur. Isolated function: -Assists in concentric acceleration of femoral adduction, flexion and internal rotation. -The adductor magnus assists in concentric acceleration of hip extension. Integrated function: -Assists in dynamic stabilization of the lumbo-pelvic-hip complex during functional movements. -Assists in eccentric deceleration of femoral abduction, extension and external rotation. -The adductor magnus assists in eccentric deceleration of hip flexion.
Adductor Brevis
originates on ramus of pubis, inserts on lesser trochanter to upper part of linea aspera, adducts thigh at hip, assists in thigh flexion and medial rotation of hip, innervated by obturaror nerve
Gracilis
Adducts thigh at the hip and flexes leg at the knee; assists in medial rotation
Pectineus
originates on superior surface of pubis, inserts on femur, adducts thigh at hip, assists in thigh flexion and medial rotation of hip, innervated by femoral and obturator nerves
Gluteus Medius
the middle of the three gluteal muscles
Gluteus Minimus
the innermost of the three gluteal muscles
Gluteus Maximus
the outermost of the three gluteal muscles, butt.
Tensor Fascia Latae
to tense the fascia lata, flex the hip, and extend the knee
Psoas
either of two muscles of the abdomen and pelvis that flex the trunk and rotate the thigh
Iliacus
Flexes thigh at the hip
Sartorius
a muscle in the thigh that helps to rotate the leg into the sitting position assumed by a tailor, the longest muscle in the human body.
Piriformis
Abducts and laterally rotates thigh at the hip
Rectus Abdominis
Flexes trunk, Abs
External Oblique
Compresses abdomen; laterally flexes and rotates vertebral column
Internal Oblique
Supports abdominal viscera against pull of gravity; stabilizes vertebral column during heavy lifting; maintains posture; compresses abdominal organs, thus aiding in forceful expiration of contents during childbirth, urination, defecation, and vomiting; unilateral contraction causes ipsilateral rotation of waist.