The ulnar nerve runs from the armpit to the wrist
, where is splits into several smaller nerves that continue to the tips of certain fingers
. The ulnar nerve plays an important role in the sense of touch of part of the hand
and the 5th and 4th fingers, including a part of the 3rd, yet its primary function is to ensure finger
movement. If this nerve is damaged by pressure, or a lesion
caused by fractures, especially those of the upper section of the humerus
or inner section of the elbow
, the consequences can include mobility and sense impairment of the affected areas.