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Questions and Answers
What is the function of Flexor Carpi Radialis?
What is the function of Flexor Carpi Radialis?
What action does Flexor Digitorum perform?
What action does Flexor Digitorum perform?
What is the role of Palmaris Longus?
What is the role of Palmaris Longus?
Anchors skin and fascia of palmar region; resists shearing forces.
What does Flexor Pollicis Longus do?
What does Flexor Pollicis Longus do?
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Which muscle extends the wrist and aids in ulnar flexion?
Which muscle extends the wrist and aids in ulnar flexion?
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Which muscle is responsible for abducting the thumb in the frontal plane?
Which muscle is responsible for abducting the thumb in the frontal plane?
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What is the primary action of Extensor Digitorum?
What is the primary action of Extensor Digitorum?
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How does Opponens Pollicis assist thumb movement?
How does Opponens Pollicis assist thumb movement?
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What does Abductor Digiti Minimi do?
What does Abductor Digiti Minimi do?
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What is the action of Flexor Digiti Minimi Brevis?
What is the action of Flexor Digiti Minimi Brevis?
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Study Notes
Flexor Muscles
- Flexor Carpi Radialis: Flexes the wrist anteriorly and assists in radial flexion.
- Flexor Carpi Ulnaris: Flexes the wrist anteriorly while aiding in ulnar flexion.
- Flexor Digitorum Superficialis: Flexes the wrist, metacarpophalangeal, and interphalangeal joints, dependent on the actions of other muscles.
- Palmaris Longus: Anchors the skin and fascia in the palm to resist shearing forces during activities such as climbing; can be weak or absent.
- Flexor Digitorum: Flexes wrist, metacarpophalangeal, and interphalangeal joints; only muscle responsible for flexing distal interphalangeal joints.
- Flexor Pollicis Longus: Flexes phalanges of the thumb.
Extensor Muscles
- Extensor Carpi Radialis Longus: Extends the wrist and aids in radial flexion.
- Extensor Carpi Radialis Brevis: Extends the wrist while assisting in radial flexion.
- Extensor Digitorum: Extends the wrist and all digits; helps spread fingers apart when extending metacarpophalangeal joints.
- Extensor Digiti Minimi: Extends the wrist and all joints of the little finger.
- Extensor Carpi Ulnaris: Extends and stabilizes the wrist when the fist is clenched; assists with ulnar flexion.
Pollicis and Other Muscles
- Abductor Pollicis Longus: Abducts the thumb and extends it at the carpometacarpal joint.
- Extensor Pollicis Longus: Extends the distal phalanx of the thumb and aids in extending the proximal phalanx; adducts and laterally rotates the thumb.
- Extensor Pollicis Brevis: Extends the thumb at metacarpal I and the proximal phalanx.
- Extensor Indicis: Extends the wrist and index finger.
- Adductor Pollicis: Draws the thumb towards the palm, useful for gripping.
- Abductor Pollicis Brevis: Abducts the thumb in the sagittal plane.
Digiti Minimi Muscles
- Flexor Digiti Minimi Brevis: Flexes the little finger at the metacarpophalangeal joint.
- Opponens Pollicis: Flexes metacarpal I to allow opposition of the thumb to fingertips.
- Abductor Digiti Minimi: Abducts the little finger, helping to spread fingers apart.
- Opponens Digiti Minimi: Flexes metacarpal V to allow the little finger to oppose the thumb, deepening the palm.
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Description
Explore the key muscles that influence wrist and hand movements with this flashcard quiz. Each card provides essential definitions and functions of various muscles, such as Flexor Carpi Radialis and Flexor Digitorum Superficialis. Test your understanding and enhance your knowledge of musculoskeletal anatomy.
