What Nerve Root Controls Weakness In Index Finger?

Median Nervus

The median nerve provides motor (movement) functions to the forearm, wrist and hand. It also sends touch, hurting and temperature sensations from the lower arm and hand to the brain. A pinched median nervus can cause carpal tunnel syndrome. If that happens, you may accept wrist pain and issues grasping and property items.

Overview

What is the median nerve?

The median nervus helps you lot move your forearm, wrist, hand and fingers. Information technology also provides sensation to the forearm and certain parts of the mitt. (Your forearm is the lower part of the arm that extends from the elbow to the paw.) Pressure on the median nerve causes carpal tunnel syndrome.

Role

What is the purpose of the median nervus?

The median nerve provides sensory and motor (motion) functions to your forearm, wrist and hands. The nervus starts at your armpit, but its functions all accept place in your forearm or hand.

The median nerve stimulates muscles in your forearm, allowing you lot to:

Bend and straighten your wrists, thumbs and first 3 fingers.
Rotate your forearm and hand to turn your palm downward.

The median nerve is also responsible for touch, pain and temperature sensations to the:

Lesser (palm) side of the pollex, index and middle fingers, and part of the band finger.
Forearm.
Pollex side of the palm.
Top (nail bed) side of the index and middle fingers.

Beefcake

Where is the median nerve?

The median nerve is one of five nerve branches of the brachial plexus. This circuitous network of nerves helps you move your shoulders, arms and hands. Information technology also sends sensory data. The brachial plexus begins every bit nerve roots from the cervical spine in the neck. The nerves travel behind the collarbone (clavicle) through the armpit (axilla).

Y'all take a left and correct median nerve — 1 for each side of the body. The median nerve starts at the armpit and:

Connects to nervus roots in the brachial plexus that run from the C5 to C8 cervical vertebrae and the T1 thoracic vertebra.
Runs along the inside of the upper arm betwixt the bicep and triceps tendons, next to the brachial artery.
Crosses in front end of the brachial artery and goes nether the bicipital aponeurosis, a broad band of connective tissue in the cubital fossa (triangular space opposite the elbow joint).
Travels with the ulnar nerve down the forearm, where information technology branches into smaller nerves.
Enters the hand through the carpal tunnel, a space in the wrist that holds the median nerve and tendons.

What are the median nerve branches?

The median nerve branches include:

Muscular branch: Controls movement in the forearm's superficial muscles, close to the peel.
Deep (volar interosseous) branch: Controls deeper muscles in the front role of the forearm.
Palmar co-operative: Sends sensory data to and from the palm, thumb and some of the fingers.

What are the other nerves in the arm?

The fretfulness in the arm are part of your peripheral nervous system. This system sends signals from your brain to the upper limbs, lower limbs and certain organs.

Four other nerves also aid arm movements and sensations:

Axillary nerve.
Musculocutaneous nerve.
Radial nervus.
Ulnar nervus.

Atmospheric condition and Disorders

What atmospheric condition and disorders affect the median nerve?

Pressure on the median nerve can cause a pinched nerve (nervus entrapment) or neuropathy (nerve harm). Or you may develop a nerve pinch syndrome, such as:

Carpal tunnel syndrome: Tissue swelling inside the carpal tunnel puts pressure on the median nervus. You may experience finger pain, wrist pain and numbness.
Inductive interosseous nervus syndrome: Damage to the anterior interosseous nerve (a motor branch of the median nerve) causes weakness or paralysis in the thumb and index finger. It can affect your power to pinch items between your thumb and index finger. It too causes wrist pain.
Pronator teres syndrome: The pronator teres muscle near the elbow pinches the median nerve. This status causes dull, agonized pain in the forearm. Information technology can also crusade thumb and finger numbness or paralysis.

What are the signs of median nerve issues?

Signs of a pinched median nervus include:

Hand or wrist pain, numbness, weakness or tingling.
Hand pain that wakes you at dark.
Pain, called-for or tingling sensation in the forearm.
Problems grasping items, writing or using a keyboard.
Tenderness or hurting in the elbow.
Loss of musculus in the thumb (a rare symptom).

Care

How can I protect my median nerves?

These steps can keep your nervous system healthy:

Ask for assistance to quit smoking. (Nicotine slows blood period to your fretfulness.)
Meliorate your sleep habits.
Strive to maintain a healthy weight through exercise and a nutritious diet.
Have medicines and prefer lifestyle changes to amend conditions like diabetes and high blood force per unit area that can damage nerves.
Try to meditate, write in a journal or find other healthful means to cope with stress.

Frequently Asked Questions

When should I talk to a doctor?

You should call your healthcare provider if you experience:

Difficulty picking up or holding on to items.
Hurting, numbness or weakness in the forearm, wrist, thumb or fingers.
Problems performing everyday tasks like buttoning a shirt.
Unexplained elbow or wrist pain.

A note from Cleveland Clinic

The median nerves play a critical role in wrist, hand and finger movements. They as well aid sensations. When there's pressure on the median nerve, you lot may develop carpal tunnel syndrome. This pinched nerve trouble causes hurting, weakness or numbness in the wrist, hand or fingers. Your healthcare provider can diagnose the condition and suggest treatments for symptom relief.