Musculo-neuro-vascular systems of the hand and carpal tunnel Flashcards
What type of joint is the DIP joint and what are its actions
Synovial hinge joint
Flexion + extension
What type of joint is the PIP joint and what are its actions
Synovial hinge joint
Flexion & extension
What type of joint is the MCP joint?
Synovial condyloid joint
What type of joint is the MCP joint?
Synovial condyloid joint
Lateral eminence of palmar surface
Thenar eminence
Medial eminence of palmar surface
Hypothenar eminence
What separates the two eminences
The central concavity
Compartments of the hand (5)
Thenar compartment
Adductor compartment
Hypothenar compartment
Central compartment
Interosseous compartment
Compartments of the hand are separated by
Fibrous septa
Muscles of thenar compartment (3)
Abductor pollicis breves
Flexor pollicis breves
Opponens pollicis
Origin of abductor pollicis brevis
Tubercle of scaphoid
Flexor retinaculum
Innervation of abductor pollicis brevis
Lateral branch of median nerve
Insertion of abductor pollicis brevis
Proximal phalanx of thumb, lateral surface of base
Actions of abductor pollicis brevis
Abducts thumb and assists in opposition at CMC joint
Origin of flexor pollicis brevis
Trapezium and adjacent flexor retinaculum
Insertion of flexor pollicis brevis
Proximal phalanx of thumb
Innervation of flexor pollicis brevis
Recurrent branch of median nerve
Actions of flexor pollicis brevis
Flexes thumb at cmc/mcp joint
Origin of opponens pollicis
Trapezium and adjacent flexor retinaculum
Insertion of opponens pollicis
Lateral border of first metacarpal
Innervation of opponens pollicis
Lateral branch of median nerve
Actions of opponens pollicis
Assists with opposition of thumb
Flexion, adduction + medial rotation at first CMC joint
Muscle of adductor compartment
Adductor pollicis
Origin of Adductor pollicis
Transverse head: anterior surface of body of third metacarpal
Oblique head: bases of metacarpals 2 and 3, capitate and trapezoid
Insertion of Adductor pollicis
Medial side of proximal phalanx of thumb
Innervation of Adductor pollicis
Deep branch of ulnar nerve
Actions of Adductor pollicis
Adducts thumb at first CMC joint
Muscles of hypothenar compartment (3)
Abductor digiti minimi
Flexor digiti minimi brevis
Opponens digiti minimi
Origin of Abductor digiti minimi
Pisiform and flexor retinaculum
Insertion of Abductor digiti minimi
Medial base of proximal phalanx of little finger
Innervation of Abductor digiti minimi
Deep branch of ulnar nerve
Actions of Abductor digiti minimi
Abducts little finger
Origin of flexor digiti minimi brevis
Hook of hamate and flexor retinaculum
Insertion of flexor digiti minimi brevis
Medial surface of base of proximal phalanx