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How many phalanges does a finger have?
What are phalanges of the hand?
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Nov 13, 2023 · There are fourteen phalanges in each hand; each of the medial four digits has three phalanges (proximal, middle and distal), while the thumb has only two (proximal and distal). The phalanges are interconnected by interphalangeal joints and vascularized via the nutrient rami to phalanges, which stem from the palmar digital arteries.
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- Nutrient rami from palmar digital arteries
Phalanges. The 14 bones that are found in the fingers of each hand and also in the toes of each foot. Each finger has 3 phalanges (the distal, middle, and proximal); the thumb only has 2. Metacarpal bones. The 5 bones that compose the middle part of the hand. Carpal bones. The 8 bones that create the wrist.
- Where Are The Hand and Wrist located?
- How Are The Hand and Wrist structured?
- Hand and Wrist Anatomy
- Hand and Wrist Bones
- Hand and Wrist Muscles
- Hand Nerves and Wrist Nerves
- Hand and Wrist Tendons
- Hand and Wrist Ligaments
- Hand and Wrist Arteries and Blood Vessels
- Hand and Wrist Lymphatics
Your wrist is the joint at the end of your forearm. It’s the hinge between your arm and hand that lets you reposition your hand. Your hand begins where your wrist ends. It includes your palm, fingers and thumb.
Your hand and wrist are structured to allow you to move, flex and rotate your wrist joint and to use your hand to grab and touch objects. Your wrist acts like a pivot point that can move in almost any direction as you reach and flex your hand. Think about your hand and wrist like a crane game at an arcade. Your hand is the claw that grabs and holds...
The parts that make up your hand and wrist are layered upon each other to form a three-dimensional shape that gives them the ability to move and function. Your hand and wrist are made of: 1. Bones. 2. Muscles. 3. Nerves. 4. Tendons. 5. Ligaments. 6. Blood vessels(arteries and veins). 7. Lymphatic vessels.
Bones provide the main structural support in your hand and wrist. They give them their shape and are the anchors other pieces are connected to.
Muscles are soft tissue made of stretchy fiber. Intrinsic muscles inside your hand work with extrinsic muscles near the outside of your hand and in your forearm to give your hand its strength and dexterity.
Nerves control your muscles and help you feel and process sensations, including: 1. Touch. 2. Temperature. 3. Pain. 4. Pressure. Three main nerves give your hand and wrist sensation: 1. Radial nerve. 2. Median nerve. 3. Ulnar nerve. All three of these nerves are connected to many branches of smaller nerves that spread out into your hand and wrist.
Tendons link your muscles to your bones. They’re like strong, flexible ropes. Your hand and wrist have two groups of tendons: 1. Extensor tendons: Tendons that help you extend and straighten your fingers, hand and wrist. 2. Flexor tendons:Tendons that help you flex and curl your fingers, hand and wrist.
Ligaments are the other type of connective tissue in your hand. If tendons are like ropes, ligaments are more like thick rubber bands. Their main functions include: 1. Helping your joints move smoothly. 2. Protecting your joints from bending too far. 3. Keeping your joints in the proper alignment.
Your hand and wrist get blood from two arteries. The radial artery runs along your radius (closer to your thumb). The ulnar artery runs along your ulna (closer to your pinkie finger). These arteries communicate with each other in “arches” that form in your hand. There’s a superficial and deep arch in your hand. Vessels branch off the arches and sup...
Your lymphatic system is a network of tissue, vessels and organs that collect excess plasma from your bloodstream and redistribute it throughout your body. Tiny capillaries in your hand capture extra plasma from the blood vessels that supply your hand and wrist. They connect to bigger lymph nodes and vessels in your upper arm.
Nov 13, 2023 · Arteries & veins. Wrist anatomy. Sources. Related articles. + Show all. Bones. The bones of the hand can be divided into three distinct groups: Carpals. Metacarpals. Phalanges.
There are two types of pulley systems in the hand: Annular pulleys: well-defined thickened areas of tendon sheath going across the tendons. Cruciform pulleys: help with approximation of the annular pulley during flexion and maintain the integrity of the flexor sheaths. You can read more on the hand pulleys here. Muscles of the Hand [edit | edit ...
Mar 31, 2024 · Carpal bones (proximal) – a set of eight irregularly shaped bones. They are located in the area of the wrist. Metacarpals – a set of five bones, each one related to a digit. They are located in the area of the palm. Phalanges (distal) – the bones of the digits. The thumb has two phalanges, whilst the rest of the fingers have three.
Jul 24, 2023 · The hand serves as the origin and/or insertion for a vast number of muscles. The intrinsic muscles of the hand contain the origin and insertions within the carpal and metacarpal bones. The extrinsic muscles of the hand originate outside the hand, commonly the forearm, and insert into hand structures. A rule of thumb is that any muscle tendon that crosses a joint will act on that joint. For ...
