Knowra Index finger Index finger The second digit of the hand, between the thumb and middle finger. Its independent movement makes it especially useful for pointing, pressing, and precise manipulation.
Hand : The terminal part of the human arm, containing the wrist, palm, and five digits. The index finger is one of the hand’s five digits.
Extensor digitorum muscle : A forearm muscle whose tendons extend the fingers at their joints. Its tendon helps extend the index finger alongside its dedicated extensor.
Pointing gesture : A gesture that directs attention toward a person, object, or location, often by extending a finger. The index finger is the digit most commonly extended to indicate a target.
Thumb : The first digit of the hand, opposable to the fingers in many grasping movements. Its opposition to the index finger enables pinch and precision grip.
Finger : A jointed digit of the hand used for grasping, sensing, and manipulation. The index finger is one of the hand’s four fingers, distinct from the thumb.
Flexor digitorum profundus : A forearm muscle that bends the distal joints of the fingers. Its tendon flexes the index finger’s fingertip joint for gripping.
Precision grip : A grasp in which the thumb and fingertips manipulate an object with fine control. The index finger commonly opposes the thumb to hold or adjust small objects.
Middle finger : The central and usually longest finger, between the index and ring fingers. It differs in position and is less commonly used alone for pointing.
Phalanx : A bone forming one segment of a finger or toe. Three phalanges give the index finger its articulated structure.
Flexor digitorum superficialis : A forearm muscle that bends the middle joints of the fingers. It flexes the index finger’s middle joint during grasping.
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