Snowboarding

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Snowboarding

• Lauren, Katie, Amanda, Liz

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In Motion
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Basic Muscles

• Rectus Femoris
• Gluteus Maximus
• Gastrocnemius
• Rectus Abdominus

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Rectus Femoris

• The rectus femoris muscle is one of quadriceps
  muscles.
• It goes from the hip to the knee and can be used
  to straighten the knee or lift the knee up.

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Rectus Femoris

• Origin
• anterior head anterior inferior iliac spine
  (AIIS)
• posterior head ilium just above the acetabulum
• Attachment
• common quadriceps tendon into patella
• patellar ligament

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Rectus Femoris
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Gastrocnemius

• the muscle in the back part of the leg that forms
  the greater part of the calf
• the most superficial of the muscles of the
  posterior compartment of the lower limb distal to
  the knee.
• It acts to plantar flex the foot at the ankle and
  raise the heel during walking

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Gastrocnemius

• Origin
• medial head just above medial condyle of femur
• lateral head just above lateral condyle of femur
• Attachment
• Achilles Tendon

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Gastrocnemius
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Gluteus Maximus

• is one of the largest and strongest muscles in
  the body.
• the most superficial muscle in the gluteal region
• broad and thick fleshy mass of a quadrilateral
  shape.
• Extends and rotates hip. Maintain knee extension.

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Gluteus Maximus

• Origin
• outer rim of ilium
• dorsal surface of sacrum and coccyx
• sacrotuberous ligament
• Attachment
• IT band (primary insertion)
• gluteal tuberosity of femur

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Gluteus Maximus
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Rectus Abdominus

• Rectus abdominis controls the tilt of the pelvis
  and curvature of the lower spine.
• Also known as abs

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Rectus Abdominus

• Origin
• pubis
• Insertion
• cartilage of 5th - 7th ribs

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Rectus Abdominus