A finger joint can refer to several things, depending on the context. Let's explore the different meanings:
1. Anatomical Finger Joints:
The finger, excluding the thumb, has three joints:
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Metacarpophalangeal (MCP) Joint: This is the joint at the base of the finger, where the metacarpal bone (in the hand) meets the proximal phalanx (the first bone of the finger). It's often referred to as the "knuckle." https://www.assh.org/handcare/blog/anatomy-101-finger-joints
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Proximal Interphalangeal (PIP) Joint: This is the joint in the middle of the finger, connecting the proximal and middle phalanges.
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Distal Interphalangeal (DIP) Joint: This is the joint closest to the fingertip, connecting the middle and distal phalanges. Heberden's nodes, small bony growths, often appear on this joint. https://my.clevelandclinic.org/health/symptoms/21829-heberdens-nodes Mucous cysts also commonly appear on this joint. https://www.toi-health.com/physician-articles/mucous-cysts-finger/ Each finger (excluding the thumb) has one PIP and one DIP joint. https://www.arthritis.org/health-wellness/about-arthritis/where-it-hurts/hand-and-wrist-anatomy
The thumb has only two joints: a metacarpophalangeal joint and an interphalangeal joint.
Each of these anatomical joints are crucial for the movement and dexterity of the fingers. Conditions like osteoarthritis can affect these joints. https://www.health.harvard.edu/diseases-and-conditions/identifying-arthritis-in-your-fingers-and-thumbs
2. Woodworking Finger Joint:
In woodworking, a "finger joint," also known as a comb joint, is a type of joinery created by interlocking precisely cut "fingers" on two pieces of wood. https://en.wikipedia.org/wiki/Finger_joint
