Interphalangeal Joint Flashcards

What type of joint is the interphalangeal joint?

What is another name for a hinge joint?

The bones involved in the interphalangeal joint are the ______, ______, and ______.

What is the range of motion for the interphalangeal joint?

Which muscles act on the flexion of the interphalangeal joint?

Which muscles are involved in the extension of the interphalangeal joint?

What nerves are responsible for the innervation of the interphalangeal joint?

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.

Test your knowledge of the interphalangeal joint with these flashcards. This quiz covers definitions, classifications, and the anatomy involved in this critical hinge joint. Perfect for students of anatomy or anyone interested in human physiology.