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Muscles of the Extremities

Muscles of the Extremities. Justin R. Stone AH 129 Tortora : Ch 11. Muscles: Intrinsic Hand Muscles. Upper Extremity Adductor Pollicis Abductor Pollicis Brevis Opponens Pollicis Flexor Pollicis Brevis Abductor Digiti Minimi Flexor Digiti Minimi Brevis Lumbricals Palmar Interossei

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Muscles of the Extremities

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  1. Muscles of the Extremities Justin R. Stone AH 129 Tortora: Ch 11

  2. Muscles:Intrinsic Hand Muscles

  3. Upper Extremity • Adductor Pollicis • Abductor Pollicis Brevis • Opponens Pollicis • Flexor Pollicis Brevis • Abductor Digiti Minimi • Flexor Digiti Minimi Brevis • Lumbricals • Palmar Interossei • Dorsal Interossei

  4. Muscles:Intrinsic Hand Muscles: THUMB

  5. Adductor Pollicis • Abductor PollicisBrevis • OpponensPollicis • Flexor PollicisBrevis Upper Extremity: Intrinsic Hand Muscles: THUMB

  6. Adductor Pollicis • O/I: • O: Oblique Head: Capitate and 2nd-3rd Metacarpals • O: Transverse Head: 3rd Metacarpal • I: Medial aspect of proximal phalynx of thumb (CONTAINS SESMOID) • N: Ulnar • A: Adducts Thumb at CMC and MCP Upper Extremity:Intrinsic Hand Muscles: THUMB

  7. Adductor Pollicis

  8. Abductor Pollicis Brevis • O/I: • O: Flexor retinaculum, scaphoid, trapezium • I: Lateral aspect of 1st proximal phalynx • N: Median • A: Abducts thumb at CMC Upper Extremity:Intrinsic Hand Muscles: THUMB

  9. Abductor Pollicis Brevis

  10. OpponensPollicis • O/I: • O: Flexor Retinaculum, Trapezium • I: Lateral aspect of 1st Metacarpal • N: Median • A: Opposition (Moves thumb to meet tip of 5th finger at CMC) Upper Extremity:Intrinsic Hand Muscles: THUMB

  11. Opponens Pollicis

  12. Flexor Pollicis Brevis • O/I: • O: Flexor Retinaculum, Trapezium, Trapezoid, Capitate • I: Lateral aspect of 1st proximal phalynx • N: Median and Ulnar • Flex Thumb at CMC and MCP Upper Extremity:Intrinsic Hand Muscles: THUMB

  13. Flexor Pollicis Brevis

  14. Lab: Intrinsic Hand Muscles: Thumb • Color: Netter’s • Color: Sieg and Adams p.46-49 • Flashcards • Palpate: O/I of Intrinsic Hand Muscles of the Thumb and Palpate muscle while performing Action Upper Extremity: Intrinsic Hand MusclesTHUMB

  15. Muscles:Intrinsic Hand Muscles: 5th FINGER

  16. Abductor DigitiMinimi • Flexor DigitiMinimiBrevis • OpponensDigitiMinimi Upper Extremity: Intrinsic Hand Muscles: 5th FINGER

  17. Abductor DigitiMinimi • O/I: • O: Pisiform, tendon of flexor carpiulnaris • I: Medial aspect of 5th proximal phalanx • N: Ulnar • A: Abducts and Flexes 5th finger at MCP Upper Extremity:Intrinsic Hand Muscles: 5th FINGER

  18. Abductor DigitiMinimi

  19. Flexor DigitiMinimi (Brevis) • O/I: • O:Flexor retinaculum, hamate • I: Medial aspect of 5th proximal phalanx • N: Ulnar • A: Flexes 5th finger at CMC and MCP Upper Extremity:Intrinsic Hand Muscles: 5th FINGER

  20. Flexor DigitiMinimi (Brevis)

  21. OpponensDigitiMinimi • O/I: • O: Flexor retinaculum, hamate • I: Medial aspect of 5th metacarpal • N: Ulnar • A: Opposition (moves 5th finger at CMC across palm to meet tip of 1st finger) Upper Extremity:Intrinsic Hand Muscles: 5th FINGER

  22. OpponensDigitiMinimi

  23. OpponensDigitiMinimi

  24. Lab: Intrinsic Hand Muscles: 5th Finger • Color: Netter’s • Color: Sieg and Adams p.50-52 • Flashcards • Palpate: O/I of Intrinsic Hand Muscles of the 5th Finger and Palpate muscle while performing Action Upper Extremity: Intrinsic Hand Muscles5th FINGER

  25. Muscles:Intrinsic Hand Muscles

  26. Lumbricals • PalmarInterossei • Dorsal Interossei Upper Extremity: Intrinsic Hand Muscles

  27. Lumbricals: 4 • O/I: • O: Flexor DigitorumProfundus Tendons • I: Extensor Expansion of Dorsal Hand (Aponeurosis of Tendons of Extensor Digitorum Muscles) • N: Median and Ulnar • A: Allow Flexion at MCP while maintaining Extension at IP **2 Unipennate, 2 Bipennate Upper Extremity:Intrinsic Hand Muscles

  28. Lumbricals

  29. PalmarInterossie: 3 • O/I: • O: Palmar Aspect of Shaft of 2nd, 4th, and 5th Metacarpals • I: Base of Proximal Phalanges and Extensor Expansion of 2nd, 4th, and 5th Metacarpals • N: Ulnar • A: • Adduct 2nd, 4th, and 5th Fingers (PAD) • Assist in Flexion of 2nd, 4th, and 5th Fingers **Unipennate Upper Extremity:Intrinsic Hand Muscles

  30. PalmarInterossei

  31. Dorsal Interossei: 4 • O/I: • O: Each has 2 heads, Arising from Dorsal Surfaces of Adjacent Metacarpals • I: Extensor Expansion and Proximal Base of 2nd, 3rd, and 4th Phalanges • N: Ulnar • A: • Abducts 2nd, 3rd, and 4th fingers (DAB) • Assists in Flexion of 2nd, 3rd, and 4th fingers • Assists in Extension of all fingers **Bipennate Upper Extremity:Intrinsic Hand Muscles

  32. Dorsal Interossei

  33. Lab: Intrinsic Hand Muscles • Color: Netter’s • Color: Sieg and Adams p.53-55 • Flashcards • Palpate: O/I of Intrinsic Hand Muscles and Palpate muscle while performing Action Upper Extremity: Intrinsic Hand Muscles

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