Potential Causes of a Numb Thumb or Hand - innervation for thumb and first finger



The thumb is the first digit (finger) of the hand. When a person is standing in the medical anatomical position (where the palm is facing to the front), the thumb is the outermost digit. The Medical Latin English noun for thumb is pollex (compare hallux for big toe), and the corresponding adjective for thumb is Artery: Princeps pollicis artery. The median nerve is a nerve in humans and other animals in the upper limb. In the hand, the median nerve supplies motor innervation to the first and second lumbrical muscles. It also supplies the muscles of the thenar eminence by a recurrent thenar branch. due to an hyperextension of index finger and thumb, and an adducted thumb;From: Lateral cord and Medial cord.

Aug 23, 2019 · In the thumb, this is most noticeable in the muscle that pulls the thumb away from the first finger, as if mimicking the cocked hammer of a gun. Understanding the Ulnar Nerve Injury to the ulnar nerve as it travels from your neck down to your fingers can cause numbness and tingling along the side of your hand, especially your ring finger and. Fukumoto et al. described the innervation pattern of the deep branch of the ulnar nerve, which contributed to the volar aspects of the second, third, fourth, and fifth carpometacarpal joints but not the thumb CMC joint. 16 Our findings confirm that the innervation pattern of the thumb CMC involves multiple nerves and may be highly variable from Cited by: 9.

Sensory innervation. The median nerve provides sensory innervation to the skin of the palmar side of the thumb, index, and middle fingers and the radial half of the ring finger. The radial side of the palm is innervated by the palmar cutaneous branch of the median nerve. This nerve branches from the median nerve proximal to the wrist. Motor. Start studying Muscles of the Thumb & Hand (w/ nerve innervation). Learn vocabulary, terms, and more with flashcards, games, and other study tools. Base of first metacarpal Nerve innervation: Radial C6, 7, 8 second, fourth, and fifth fingers toward the third finger, Assist to flex the thumb, second, fourth, and fifth fingers at the.