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LOWER MUSCLES

LOWER MUSCLES. Muscles of the thorax (respiratory muscles). 1. Internal Intercostals Action - Depress ribs 2. External Intercostal Action - Elevate ribs. Muscles of the abdominal wall. External Abdominal Oblique Action - Compress abdomen

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LOWER MUSCLES

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  1. LOWER MUSCLES

  2. Muscles of the thorax (respiratory muscles) 1. Internal Intercostals Action - Depress ribs 2. External Intercostal Action - Elevate ribs

  3. Muscles of the abdominal wall • External Abdominal Oblique Action - Compress abdomen 2. Internal Abdominal Oblique Action - Compress abdomen 3. Rectus Abdominis Action - Flex vertebral column 4. Transverse Abdominis Action - Compress abdomen

  4. Muscles of the abdominal wall

  5. Muscles that act on the vertebral column • Erector Spinae Group Action - Extends head and vertebral column

  6. Muscles that act on the thigh Gluteus maximus Action- Extend and laterally rotate thigh Gluteus medius Action- Abduct and medially rotate thigh Tensor fasciae latae Action- Abduct thigh Adductor longus Action- Adduct thigh Adductor brevis Action- adduct thigh Adductor magnus Action- Adduct thigh

  7. Muscles that act on the thigh

  8. Muscles that act on the leg • Rectus Femoris Action - Extend leg • Vastus Lateralis Action - Extend leg • Vastus Medialis Action - Extend leg • Vastus Intermedialis Action - Extend leg • Sartorius Action - Medially rotates leg • Gracilis Action- Flex leg • Semitendinosus Action- Flex leg • Semimembranosus Action- Flex leg • Biceps femoris Action- Flex leg

  9. Muscles that act on the Leg

  10. Muscles that act on the foot/toes • Gastrocenemius Action - Plantar flex foot • Soleus Action - Plantar flex foot • Peroneus Longus Action - Plantar flex and everts foot • Peronius Brevis Action - Plantar flex and evert foot • Extensor Digitorum Longus Action - Extend digits 2-5 • Tibialis Anterior Action - Dorsiflex foot • Flexor Digitorum Brevis Action - Flex digits 2-5 • Flexor Digitorum Longus Action - Flex digits 2-5

  11. Muscles that act on the foot/toes

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