If you touch at elbow, you get a shock like feeling. Why?
SCERT Class 9 Telangana, Biology Chapter 3 Animal Tissues
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You have hit right on it, so to speak.
It's funny bone
A nerve is responsible for all that.
A nerve called ulnar nerve that runs from the neck all the way to the hand, where it innervates several muscles in the hand and forearm and ends in two branches that innervate the little and half of the ring finger.
For most of its length, the ulnar nerve is protected, like rest of the body's nerves, by bones, muscles and/or ligaments. As the nerve passes the elbow, though, it runs through a channel called the cubital tunnel, and here it's protected only by skin and fat, making it vulnerable to bumps. When you hit your funny bone, you're actually hitting the nerve against bone and compressing it. The result is an exhilarating cocktail of numbness, tingling and pain that shoots through the areas where the nerve does its work: down the forearm and hand and into the ring and little fingers.
It's funny bone
A nerve is responsible for all that.
A nerve called ulnar nerve that runs from the neck all the way to the hand, where it innervates several muscles in the hand and forearm and ends in two branches that innervate the little and half of the ring finger.
For most of its length, the ulnar nerve is protected, like rest of the body's nerves, by bones, muscles and/or ligaments. As the nerve passes the elbow, though, it runs through a channel called the cubital tunnel, and here it's protected only by skin and fat, making it vulnerable to bumps. When you hit your funny bone, you're actually hitting the nerve against bone and compressing it. The result is an exhilarating cocktail of numbness, tingling and pain that shoots through the areas where the nerve does its work: down the forearm and hand and into the ring and little fingers.
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