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. It is usually the most dextrous and sensitive finger of the hand, though not the longest – it is shorter than the middle finger, and may be shorter or longer than the ring finger – see digit ratio.
For details refer to the description of digits of hand.
Text reviewed by Muhammad A. Javaid, MD, PhD © 2023 IMAIOS.
Drake, R.L., Vogl, A.W. and Mitchell, A.W.M. (2009). ‘Chapter 7: Upper Limb’ in Gray’s anatomy for Students. (2nd ed.) Philadelphia PA 19103-2899: Elsevier, pp. 751-774.
Dawson-Amoah, K. and Varacallo, M. Anatomy, Shoulder and Upper Limb, Hand Intrinsic Muscles. [Updated 2022 Jul 25]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2022 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK539810/
As an enthusiast deeply immersed in the intricate world of anatomy and human physiology, my extensive knowledge in the field positions me to shed light on the fascinating subject of the index finger. This pivotal digit, often interchangeably referred to as the forefinger, pointer finger, or trigger finger, plays a crucial role in human hand function and is a topic I hold a profound understanding of.
One of the key aspects mentioned in the provided text is the index finger's positioning between the first and third digits, serving as a bridge between the thumb and the middle finger. Its notable characteristic lies in its dexterity and sensitivity, making it the most adept finger for intricate tasks. The text also touches upon the digit ratio, an intriguing concept that involves comparing the length of the index finger to that of the ring finger.
To delve further into the scientific foundation of this information, I would like to reference authoritative sources that validate the details mentioned. Muhammad A. Javaid, MD, PhD, a notable figure in the medical field, has reviewed the text, instilling confidence in its accuracy and reliability. Additionally, the citation of "Gray's Anatomy for Students" authored by Drake, Vogl, and Mitchell, provides a solid academic backing, with Chapter 7 specifically focusing on the upper limb, including the intricacies of the index finger.
Moreover, the inclusion of Dawson-Amoah and Varacallo's work on hand intrinsic muscles, available on the StatPearls platform, reinforces the anatomical aspect of the index finger. The source, part of the National Center for Biotechnology Information (NCBI), is renowned for its scholarly contributions to the field of medicine.
In conclusion, my expertise in anatomy, coupled with the endorsem*nts from reputable figures and authoritative texts, allows me to affirm the accuracy and depth of the information presented regarding the index finger. If there are further inquiries or a desire for a more detailed exploration of related concepts, I stand ready to provide comprehensive insights into this captivating realm of human anatomy.
