Lab Exam 4 Flashcards by Whitney Harfert

Origin of Rectus femoris:

Superior margin of acetabulum

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Insertion of Rectus femoris:

Patella and tibial tuberosity via patellar ligament

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Actions of Vastus lateralis:

Extends leg and stabilizes knee

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Origins of Vastus lateralis:

Greater trochanter, Intertrochanteric line, and linea aspera of the femur

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Insertion of Vastus lateralis:

Patella and tibial tuberosity via patellar ligament

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Action of Vastus intermedius:

Extends leg

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Origins of Vastus intermedius:

Anterior and lateral surfaces of proximal femur shaft

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Insertion of Vastus intermedius:

Patella and tibial tuberosity to via patellar ligament

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Action of Vastus medialis:

Extends leg

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Origins of Vastus medialis:

Linea aspera, medial supracondylar line, intertrochanteric line

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Insertion of Vastus medialis:

Patella and tibial tuberosity via patellar ligament

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Actions of Sartorius:

Flexes, abducts, and laterally rotates thigh; flexes leg of the knee

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Origin of Sartorius:

Anterior superior iliac spine of the pelvic bone

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Insertion of Sartorius:

Winds around medial aspect of knee and inserts into medial aspect of proximal tibia

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Actions of Gracilis:

Adducts thigh, flexes and medically rotates leg

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Origins of Gracilis:

Inferior army’s and body of pubis and adjacent ischial ramus

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Insertion of Gracilis:

Medial surface of tibia just inferior to its medial condyle

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Actions of Adductor magnus:

Adducts and medially rotates and flexes thigh; thigh extension

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Origins of Adductor magnus:

Ischial and pubic rami and ischial tuberosity

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Insertions of Adductor magnus:

Linea aspera, medial supracondylar line, and adductor tubercle of femur

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Actions of Adductor longus:

Adducts, flexes, and medially rotates thigh

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Origin of Adductor longus:

Pubis

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Insertion of Adductor longus:

Post femur

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Actions of Adductor brevis:

Adducts and medially rotates thigh

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Insertion of Adductor brevis:

Post femur

Origin of Adductor brevis:

Pubis

Actions of Tensor fasciae latae:

Steadies trunk on thigh by making iliotibial tract taut

Origin of Pectineus:

Pubis

Insertion of Pectineus:

Post femur

Actions of Pectineus:

Adducts, flexes, and medially rotates thigh

Origins of Tensor fasciae latae:

Anterior aspect of iliac crest and anterior superior iliac spine

Insertion of Tensor fasciae latae:

Iliotibial tract

Action of Gluteus maximus:

Major extensor of thigh

Origins of Gluteus maximus:

Dorsal ilium, sacrum, and coccyx

Insertions of Gluteus maximus:

Gluteal tuberosity of femur

Actions of Gluteus medius:

Abducts and medially rotates thigh

Insertion of Gluteus medius:

By short tendon into lateral aspect of greater trochanter of femur

Actions of Hamstrings:

Thigh extension; and leg flexion

Origin of Hamstrings:

Ischial tuberosity

Insertions of Hamstrings:

Tibia and fibula

Actions of Biceps femoris:

Extends thigh and flexes leg

Origins of Biceps femoris:

Ischial tuberosity, linea aspera, lateral supracondylar line, and distal femur

Insertions of Biceps femoris:

Common tendon passes downward and laterally to insert into head of fibula and lateral condyle of tibia

Actions of Semitendinosus:

Extends thigh and flexes leg

Origin of Semitendinosus:

Ischial tuberosity

Insertion of Semitendinosus:

Medial aspect of upper tibial shaft

Actions of Semimembranosus:

Extends thigh and flexes leg

Origin of Semimembranosus:

Ischial tuberosity

Insertions of Semimembranosus:

Medial condyle of tibia; thru oblique ligament of knee to lateral condyle of femur

Action of Tibialis anterior:

Prime mover of dorsiflexion

Insertion of Tibialis anterior:

By tendon into inferior surface of medial cuneiform and first metatarsal bone

Action of Extensor hallucis longus:

Extends great toe

Insertion of Extensor hallucis longus:

Tendon inserts on distal phalanx of great toe

Action of Extensor digitorum longus:

Prime mover of toe extension

Insertion of Extensor digitorum longus:

Metal and distal phalanges of toes 2-4 via extensor expansion

Action of Fibularis tertius:

Dorsiflexes and everts foot

Insertion of Fibularis tertius:

Tendon inserts on dorsum of 5th metatarsal

Actions of Fibularis brevis:

Plantar flexes and everts foot

Insertion of Fibularis brevis:

By tendon running behind lateral malleolus to insert on proximal end of 5th metatarsal

Actions of Fibularis longus:

Plantar flexes and everts foot

Insertion of Fibularis longus:

By long tendon that curves underfoot to first metatarsal and medial cuneiform

Action of Tibialis posterior:

Prime mover of foot inversion

Insertions of Tibialis posterior:

Tendon passes behind medial malleolus and under arch of foot; inserts into several tarsals and metatarsals 2-4

Actions of Flexor digitorum longus:

Plantar flexes and inverts foot; flexes toes

Insertion of Flexor digitorum longus:

Tendon runs behind medial malleolus and splits to insert into distal phalanges of toes 2-5

Actions of Flexor hallucis longus:

Plantar flexes and inverts foot; flexes great toe at all joints

Insertion of Flexor hallucis longus:

Tendon runs under foot to distal phalanx of great toe

Action of Gastrocnemius:

Plantar flexes foot

Origin of Gastrocnemius:

By 2 heads from medial and lateral condyles of femur

Insertion of Gastrocnemius:

Posterior calcaneus via calcaneal tendon

Action of Soleus:

Plantar flexes foot

Origins of Soleus:

Extensive cone-shaped origin from superior tibia, fibula, and interosseous membrane

Insertion of Soleus:

Posterior calcaneus via calcaneal tendon

Actions of Sternocleidomastoid:

Flexes and laterally rotates the head

Origins of Sternocleidomastoid:

Manubrium of sternum and medial portion of clavicle

Insertions of Sternocleidomastoid:

Mastoid process of temporal bone and superior nuchal line of occipital bone

Actions of Rectus femoris:

Extends leg and flexes thigh

Action of Rectus abdominis:

Flex and rotate lumbar region of vertebral column

Origins of Rectus abdominis:

Pubic crest and symphysis

Insertions of Rectus abdominis:

Xiphoid process and costal cartilages of ribs 5-7

Actions of External oblique:

Flex vertebral column and compress abdominal wall; trunk rotation and lateral flexion

Origins of External oblique:

By fleshy strips from outer surfaces of lower 8 ribs

Insertions of External oblique:

Most fibers insert into linea alba via a broad aponeurosis; some insert into pubic crest and tubercle and iliac crest

Actions of Internal oblique:

Flex vertebral column and compress abdominal wall; trunk rotation and lateral flexion

Origins of Internal oblique:

Lumbar fascia; iliac crest, and inguinal ligament

Insertions of Internal oblique:

Linea alba, pubic crest, last 3 or 4 ribs, and costal margin

Action of Transversus abdominis:

Compresses abdominal contents

Origins of Transversus abdominis:

Inguinal ligament, lumbar fascia, cartilages of last 6 ribs; iliac crest

Insertions of Transversus abdominis:

Linea alba, pubic crest