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Questions and Answers
What type of joint is the interphalangeal joint?
What type of joint is the interphalangeal joint?
- Hinge (correct)
- Synovial (correct)
- Cartilaginous
- Fibrous
What is another name for a hinge joint?
What is another name for a hinge joint?
Ginglymus
The bones involved in the interphalangeal joint are the ______, ______, and ______.
The bones involved in the interphalangeal joint are the ______, ______, and ______.
Proximal Phalanges, Middle Phalanges, Distal Phalanges
What is the range of motion for the interphalangeal joint?
What is the range of motion for the interphalangeal joint?
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Which muscles act on the flexion of the interphalangeal joint?
Which muscles act on the flexion of the interphalangeal joint?
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Which muscles are involved in the extension of the interphalangeal joint?
Which muscles are involved in the extension of the interphalangeal joint?
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What nerves are responsible for the innervation of the interphalangeal joint?
What nerves are responsible for the innervation of the interphalangeal joint?
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Study Notes
Interphalangeal Joint Overview
- Follows a synovial structure, allowing for joint fluid and movement.
- Classified specifically as a hinge joint, enabling movement in one plane.
Terminology
- A hinge joint is also known as a ginglymus, highlighting its function and structure.
Anatomical Components
- Consists of proximal phalanges, middle phalanges, and the connection between middle and distal phalanges.
Movement Capabilities
- Capable of flexion, bending the digits inward.
- Allows for extension, straightening the digits outward.
Muscular Actions
- Flexor muscles responsible for flexion include:
- Flexor Digitorum Superficialis: aids in bending fingers.
- Flexor Digitorum Profundus: deep muscle contributing to finger flexion.
- Extension involves various muscles:
- Extensor Digitorum: primary muscle for expanding fingers.
- Lumbricals: assist in finger extension.
- Interossei: provide additional support for finger movements.
Neural Innervation
- Innervated by:
- Median Nerve: responsible for movements of most fingers.
- Ulnar Nerve: particularly affects the pinky and ring finger.
- Radial Nerve: provides extensors for the back of the hand.
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