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The index finger is the hand’s second digit. It is one of the most frequently used digits, along with the thumb and middle finger. This finger has functional applications in sensory touch and grip, but it is also often used for expressive purposes. This is generally expressed by nonverbal hand gestures.
The index finger (also referred to as forefinger, [1] first finger, [2] second finger, [3] pointer finger, trigger finger, digitus secundus, digitus II, and many other terms) is the second digit of a human hand. It is located between the thumb and the middle finger.
The index finger is the second digit of the hand. Along with the thumb and middle finger, it is one of the most often-used digits. This finger has practical applications of both sensory touch and...
They are numbered, and each is associated with a digit: Metacarpal I – thumb. Metacarpal II – index finger. Metacarpal III – middle finger. Metacarpal IV – ring finger. Metacarpal V – little finger. Each metacarpal consists of a base, shaft and a head.
The four fingers (index, middle, ring, and little fingers) have three phalanges each—called the proximal, middle, and distal phalanges. The thumb is slightly different, as it only has the proximal and distal phalanges.
Median nerve – palmar surface, tips and nail beds of the thumb, index, middle and half of the ring fingers. Ulnar nerve – palmar and dorsal (back of the hand) surface of the other half of the ring finger and the little finger.
This nerve gives sensation to the thumb, index finger, long finger, and half of the ring finger. It also sends a nerve branch to control the thenar muscles of the thumb. The thenar muscles help move the thumb and let you touch the pad of the thumb to the tips each of each finger on the same hand, a motion called opposition.
The index finger, (also referred to as forefinger, pointer finger, trigger finger, digitus secundus, digitus II, and many other terms), is the first finger and the second digit of a human hand. It is located between the first and third digits, between the thumb and the middle finger.
Let’s dive into the intricate details of the index finger’s anatomy. The index finger consists of three bones: proximal phalanx, intermediate phalanx, and distal phalanx. These bones are connected by joints, which allow for a wide range of movements.
Going from lateral to medial, they are named thumb (digit 1), index finger (digit 2), middle finger (digit 3), ring finger (digit 4) and little finger (digit 5). This article will describe the anatomy and functions of the phalanges of hand.