Lab 5 Flashcards
Origin of Abductor Pollicus Brevis
- Flexor retinaculum
- Trapezium
- Scaphoid
Insertion of Abductor Pollicis Brevis:
Base of proximal phalanx of digit 1
Action of Abductor Pollicis Brevis:
Abduction of thumb at CMC Joint
Nerve supply of Abductor Pollicis Brevis:
Median Nerve
OIAN Abductor Pollicis Brevis:
Origin:
- Flexor retinaculum
- Trapezium
- Scaphoid
Insertion: - Base of proximal phalanx of digit 1
Action: - Abduction of thumb at CMC Joint
Nerve Supply: - Median nerve
Origin of Flexor Pollicis Brevis (2 heads)
- Superficial head – flexor retinaculum and trapezium
- Deep head – trapezium and capitate
Insertion of Flexor Pollicis Brevis
- Base of proximal phalanx of digit 1
Action of Flexor Pollicis Brevis
- Flexion of thumb at MCP joint
Nerve Supply of Flexor Pollicis Brevis
- Superficial head – median nerve
- Deep head – ulnar nerve
OIAN of Flexor Pollicis Brevis
Origin:
- Superficial head – flexor retinaculum and trapezium
- Deep head – trapezium and capitate
Insertion: - Base of proximal phalanx of digit 1
Action: - Flexion of thumb at MCP joint
Nerve Supply:
- Superficial head – median nerve
- Deep head – ulnar nerve
Origin of Opponens Pollicis:
- Flexor retinaculum
- Trapezium
Insertion of Opponens Pollicis:
Radial shaft of 1st metacarpal
Action of Opponens Pollicis:
Opposition of thumb at CMC joint
Nerve supply of Opponens Pollicis:
Median Nerve
OIAN of Opponens Pollicis:
Origin:
- Flexor retinaculum
- Trapezium
Insertion: - Radial shaft of 1st metacarpal
Action: - Opposition of thumb at CMC joint
Nerve Supply: - Median nerve
Origin of Adductor Pollicis
- Transverse head – anterior surface of 3rd metacarpal
- Oblique head – bases of 2nd and 3rd metacarpals;
capitate, trapezoid and trapezium
Insertion of Adductor Pollicis
Base of proximal phalanx of digit 1
Action of Adductor Pollicis
Adduction of thumb at CMC joint
Nerve supply of Adductor Pollicis
Ulnar Nerve
OIAN of Adductor Pollicis
Origin:
- Transverse head – anterior surface of 3rd metacarpal
- Oblique head – bases of 2nd and 3rd metacarpals;
capitate, trapezoid and trapezium
Insertion: - Base of proximal phalanx of digit 1
Action: - Adduction of thumb at CMC joint
Nerve Supply: - Ulnar nerve