Thenar Muscles Flashcards Preview

Upper Limb (plus back and chest wall) > Thenar Muscles > Flashcards

Flashcards in Thenar Muscles Deck (8)
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1

Adductor Pollicis

Origin

Insertion

Origin: 

  • Transverse head: M3
  • Oblique head: M2-3 bases and trapezoid + capitate

Insertion:

  • Medial base of proximal phalanx of D1
  • Ulnar sesamoid

2

Adductor Pollicis

Action

Innervation

Action: 

  • Thumb adduction

Innervation:

  • Deep branch of ulnar n.

3

Abductor Pollicis Brevis

Origin

Insertion

Origin: 

  • Scaphoid and trapezium

Insertion:

  • Radial sesamoid and radial base of proximal phalanx of D1

4

Abductor Pollicis Brevis

Action

Innervation

Action:

  • Thumb abduction

 Innervation:

  • Recurrent branch of median n.

5

Flexor Pollicis Brevis

Origin

Insertion

Origin:

  • Trapezium
  • Flexor retinaculum

 Insertion:

  • Proximal phalanx of D1

6

Flexor Pollicis Brevis

Action

Innervation

Action:

  • Thumb flexion

 Innervation:

  • Recurrent branch of median n.

7

Opponens Pollicis

Origin

Insertion:

Origin:

  • Trapezium

 Insertion:

  • Radial side of M1

8

Opponens Pollicis

Action

Innervation

Action: 

  • Thumb flexion aiding in opposition

Innervation:

  • Recurrent branch of median n.