Wrist and Palmar Hand POINA Flashcards
Flexor Digitorum Superficialis Purposeful Action
Brush teeth, comb hair, carrying briefcase (functional grasp and pinch)
Flexor Digitorum Superficialis Main Action
-Flex middle phalanges at proximal IP joints at medial 4 digits (stronger)
-Flexes proximal phalanges at MCP joints
Flexor Digitorum Superficialis Proximal Attachment
-Humero-ulnar head: medial epicondyle (common flexor origin), coronoid process
-Radial head: superior radius
Flexor Digitorum Superficialis Distal Attachment
Shafts of middle phalanges of medial four digits
Flexor Digitorum Superficialis Innervation
Median (C7-T1)
Flexor Digitorum Profundus Purposeful Action
Playing racket sports, drawing and writing (functional grasp and pinch)
Flexor Digitorum Profundus Main Action
-Flex medial 4 fingers (MCP, PIP, DIP)
-Assist to flex wrist (radiocarpal joint)
Flexor Digitorum Profundus Proximal Attachment
Proximal ulna and interosseous membrane
Flexor Digitorum Profundus Distal Attachment
-Medial: base of distal phalanges of digits 4-5
-Lateral: base of distal phalanges of digits 2-3
Flexor Digitorum Profundus Innervation
-2-3: Median (AIN, C8-T1)
-4-5: Ulnar (C8-T1)
Flexor Pollicis Longus Purposeful Action
Texting, sewing, beadwork (tip pinch)
Flexor Pollicis Longus Main Action
Flex phalanges of 1st digit (thumb)
Flexor Pollicis Longus Proximal Attachment
Anterior radius and adjacent interosseous membrane
Flexor Pollicis Longus Distal Attachment
Base of distal phalanx of thumb
Flexor Pollicis Longus Innervation
Median (AIN, C8-T1)
Flexor Pollicis Brevis Purposeful Action
Writing, beadwork, putting change in a vending machine (functional grip)
Flexor Pollicis Brevis Main Action
-Thumb flexion (CMC, MCP joints)
-Assists with thumb opposition
Flexor Pollicis Brevis Proximal Attachment
Flexor retinaculum, tubercles of scaphoid and trapezium
Flexor Pollicis Brevis Distal Attachment
Base of proximal phalanx
Flexor Pollicis Brevis Innervation
Superficial: Median nerve (recurrent branch, C8-T1)
Deep: Ulnar (deep, C8-T1)
Abductor Pollicis Brevis Purposeful Action
Texting, hitting space bar when typing
Flexor Pollicis Brevis Main Action
-Abduct thumb (CMC and MCP joint)
-Assist in thumb opposition
Flexor Pollicis Brevis Proximal Attachment
Flexor retinaculum and tubercles of scaphoid and trapezium
Flexor Pollicis Brevis Distal Attachment
Base of proximal phalanx
Flexor Pollicis Brevis Innervation
Superficial: Median nerve (recurrent, C8-T1)
Deep: Ulnar nerve (deep, C8-T1)
Opponens Pollicis Purposeful Action
Grasping spherical objects
Opponens Pollicis Main Action
Oppose thumb (draws first metacarpal medially to center of palm and rotates it medially)
Opponens Pollicis Proximal Attachment
Flexor retinaculum, tubercles of scaphoid and trapezium
Opponens Pollicis Distal Attachment
1st MC
Opponens Pollicis Innervation
Medial (recurrent branch, C8-T1)
Flexor Digiti Minimi Purposeful Action
Playing trumpet, typing
Flexor Digiti Minimi Main Action
Flex 5th digit proximal phalanx at MCP joint
Flexor Digiti Minimi Proximal Attachment
Hook of hamate, flexor retinaculum
Flexor Digiti Minimi Distal Attachment
Base of 5th proximal phalanx
Flexor Digiti Minimi Innervation
Ulnar nerve (deep branch, C8-T1)
Abductor Digiti Minimi Purposeful Action
Typing, playing piano
Abductor Digiti Minimi Main Action
Abduct 5th digit (MCP joint)
Abductor Digiti Minimi Proximal Attachment
Pisiform
Abductor Digiti Minimi Distal Attachment
Base of 5th proximal phalanx
Abductor Digiti Minimi Innervation
Ulnar nerve (deep branch, C8-T1)
Opponens Digiti Minimi Purposeful Action
Holding spherical object
Opponens Digiti Minimi Main Action
5th digit opposition (CMC joint)
Opponens Digiti Minimi Proximal Attachment
Hook of hamate and flexor retinaculum
Opponens Digiti Minimi Distal Attachment
Medial border of 5th MC
Opponens Digiti Minimi Innervation
Ulnar (deep branch, C8-T1)
Adductor Pollicis Purposeful Action
Brushing hair, turning key, swiping card (lateral pinch)
Adductor Pollicis Main Action
Thumb adduction towards lateral border of thumb
Adductor Pollicis Proximal Attachment
-Oblique: base of 2nd-3rd MC, capitate and adjacent carpals
-Transverse: Anterior surface of shaft of 3rd MC
Adductor Pollicis Distal Attachment
Base of proximal phalanx of thumb
Adductor Pollicis Innervation
Ulnar nerve (deep branch, C8-T1)
Lumbricals Purposeful Action
Holding a flat object (MCP flexion with PIP/DIP extension)
Lumbricals Main Action
-MCP joint flexion
-IP joint extension
-All 2-5th digits
Lumbricals Proximal Attachment
-1/2: lateral tendons of FDP (unipennate)
-3/4: Medial tendons of FDP (bipennate)
Lumbricals Distal Attachment
Radial sides of extensor expansions of digits 2-5
Lumbricals Innervation
-1/2: Median (digital branch, C8-T1)
-3/4 Ulnar (deep branch, C8-T1)
Palmar Interossei Purposeful Action
Holding a flat object (sock puppet), playing piano
Palmar Interossei Main Action
-Digits 2, 4-5 adduction towards axial line (PADS)
-Help lumbricals with MCP joint flexion and IP joint extension (sock puppet)
Palmar Interossei Proximal Attachment
-Palmar surface of 2, 4, 5th MC (unipennate)
Palmar Interossei Distal Attachment
Bases of proximal phalanges and extensor expansions of digits 2, 4, and 5
Palmar Interossei Innervation
Ulnar nerve (deep branch, C8-T1)
Dorsal Interossei Purposeful Action
Cutting with scissors, typing
Dorsal Interossei Main Action
-Digits 2-4 abduction from axial line
-Assist lumbricals with MCP flexion and IP extension
Dorsal Interossei Proximal Attachment
Adjacent sides of two MC’s (bipennate)
Dorsal Interossei Distal Attachment
Bases of proximal phalanges and extensor expansions of digits 2-4
Dorsal Interossei Innervation
Ulnar Nerve (deep branch, C8-T1)
