Muscles of the Hand Flashcards
What are the Long Muscles of the Thumb?
Abductor Pollicis Longus
Extensor Pollicis (Longus & Brevis)
Flexor Pollicis Longus
What are the Short muscles of the Thumb?
Abductor Pollicis Brevis
Flexor Pollicis Brevis
Opponens Pollicis
Abductor Pollicis
What are the Muscles of the Hand?
Lumbricals of the Hand Palmar Interossei Dorsal Interossei Abductor Digiti Minimi Flexor Digiti Minimi Brevis Opponens Digiti Minimi
What is the (O) and (I) for the Abductor Pollicis Longus?
(O) posterior Surface of Radius and Ulna, interosseous membrane.
(I) Base of the 1st metacarpal.
What is the Action for the Abductor Pollicis Longus?
Abduction of the Thumb
Extension of the Thumb
Abduction of the Wrist
What is the (O) and (I) for the Extensor Pollicis (Longus)?
(O) Posterior surface of Ulna and Interosseous membrane.
(I) Base of Distal Phalanx of Thumb.
What is the Action for the Extensor Pollicis (Longus & Brevis)?
They both:
Extend the Thumb
Abduct the Wrist
What is the (O) and (I) for the Extensor Pollicis (Brevis)?
(O) Posterior surface of Radius and Interosseous membrane.
(I) Base of Proximal Phalanx of Thumb.
What is the (O) and (I) for the Flexor Pollicis Longus?
(O) Anterior Surface of Radius and Interosseous membrane.
(I) Base of Distal Phalanx of thumb.
What is the (O) and (I) for the Abductor Pollicis Brevis?
(O) Flexor Retinaculum, Trapezium and Scaphoid Tubercles.
(I) Base of the Proximal Phalanx of the Thumb.
What is the Action for the Abductor Pollicis Brevis?
Abduction of the Thumb
Assist in Opposition of the Thumb
What is the Action for the Abductor Pollicis Brevis?
Abduction of the Thumb
Assist in Opposition of the Thumb
What is the (O) and (I) for the Flexor Pollicis Brevis?
Superficial Head: (O) Flexor Retinaculum (I) Base of proximal Phalanx Deep Head: (O) Trapezium, trapezoid and capitate. (I) ---------
What is the Action for the Flexor Pollicis Brevis?
Flex the Thumb
Assist in Opposition of the Thumb
What is the (O) and (I) for the Opponens Pollicis?
(O) Flexor Retinaculum and Tubercle of the Trapezium.
(I) Entire Length of the 1st metacarpal bone, Radial Surface.
What is the Action for the Opponens Pollicis?
Opposition of the Thumb at the Carpometacarpal Joint
What is the (O) and (I) for the Adductor Pollicis?
(O) Capitate, Second and Third Metacarpals.
(I) Base of the proximal Phalanx of the Thumb.
What is the Action for the Adductor Pollicis?
Adduction of the Thumb
Assist to Flex the Thumb
What is the (O) and (I) for the Lumbricals of the Hand?
(O) Surfaces of the flexor didgitorum profundus tendons.
(I) Extensor Aponeurosis on dorsal surface of phalanges.
What is the Action for the Lumbricals of the Hand?
Extend 2nd - 5th fingers at the interphalangeal joints.
Flex the 2nd - 5th fingers at the Metacarpalphalangeal joints.
What is the (O) and (I) for the Palmar Interossei of the Hand?
(O) Base of 1st, 2nd, 4th and 5th metacarpals.
(I) Base of the proximal phalanx of the related finger and extensor aponeurosis.
What is the Action for the Palmar Interossei of the Hand?
Adduction of the Thumb and the 2nd, 4th and 5th fingers towards the 3rd finger.
Assist in flexion and Extension of the Mentioned locations.
What is the (O) and (I) of the Dorsal Interossei?
(O) Adjacent sides of Metacarpals.
(I) Base of proximal phalanx of the 2nd - 4th fingers and Extensor aponeurosis.
What is the Action of the Dorsal Interossei?
Abduction 2nd - 4th fingers at the metacarpalphalangeal joints.
Assist to flex and extend the the mention locations.
What is the (O) and (I) for the Abductor Digiti Minimi?
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What is the action of the Abductor Digiti Minimi?
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What is the (O) and (I) of the Flexor Digiti Minimi Brevis?
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What is the Action for the Flexor Digiti Minimi Brevis?
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What is the (O) and (I) for the Opponens Digiti Minimi?
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What is the Action for the Opponens Digiti Minimi?
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What is the Hypothenar Eminence in the Hand?
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