What bones does the thumb have?

What bones does the thumb have?

Each finger has 3 phalanges (the distal, middle, and proximal); the thumb only has 2. Metacarpal bones.

What is the bone on the thumb side called?

Radius. The radius is one of the two forearm bones and is on the thumb side of the forearm near the hand, but is always on the outside of the elbow. The position of the radius changes depending on how the hand is turned because the radius twists around the other forearm bone, the ulna.

What are the names of the thumb joints?

The three joints are as follows: Carpometacarpal (CMC) Joint. Metacarpophalangeal (MP) Joint. Interphalangeal (IP) Joint.

What is the fat part of your thumb called?

Thenar and hypothenar are two terms that describe the fleshy mass of skin, fat, and muscle on the thumb side (radial) and the small finger side (ulnar) of the hand.

What is a thumb called?

Thumb, also called pollex, short, thick first digit of the human hand and of the lower-primate hand and foot. It differs from other digits in having only two phalanges (tubular bones of the fingers and toes).

What bone does the thumb not have?

Unlike fingers, the thumb does not possess an intermediate phalanx bone. The thumb generally receives oxygenated blood by the princeps pollicis artery. The muscles of the thumb all contain the word ‘pollicis,’ and are distinguished by extensor, flexor, oppenens, and abductor designations.

What is the meaty part under your thumb called?

The thumb basal joint, called the carpometacarpal joint (see figure), is the most common joint in the hand to wear out and become symptomatic. You can feel for pain in this joint by palpating it in the fleshy part of the thumb side of the palm, about a centimeter above the wrist joint.

What are the names of the bones in the human thumb?

The finger and thumb bones are called the phalanges. Each thumb has two phalanges: a proximal phalanx articulates with the first metacarpal, and a distal phalanx forms the tip of the thumb. The rest of the fingers have three phalanges each: proximal, middle, and distal phalanges. The phalanges are fairly simple bones.

What are the names of the two bones in the thumb?

A broken thumb can increase the risk of arthritis later in life. The thumb has two bones. The first bone (distal phalange) extends from the tip of the thumb to the knuckle. The second bone (proximal phalange) extends from the knuckle to the base of the thumb. This is the area of webbing between the thumb and the first finger.

What is the bone under your thumb called?

The scaphoid bone is one of eight small bones in the wrist, called carpal bones. These bones allow complex, yet delicate movements of the hand and wrist. The carpal bones fit between the bone of the forearm and hand. The scaphoid sits below the thumb, and is shaped like a kidney bean.

What is the finger and thumb bones called?

Human hands contain fourteen digital bones, also called phalanges, or phalanx bones: two in the thumb (the thumb has no middle phalanx) and three in each of the four fingers. These are the distal phalanx, carrying the nail, the middle phalanx, and the proximal phalanx.