What is carpal tunnel syndrome? Carpal tunnel syndrome (CTS) occurs when the median nerve, which runs from the forearm into the palm of the hand, becomes pressed or squeezed at the wrist. The carpal tunnel—a narrow, rigid passageway of ligament and bones at the base of the hand—houses the median nerve and the tendons that bend the fingers.
https://www.ninds.nih.gov/Disorders/Patient-Caregiver-Education/Fact-Sheets/Carpal-Tunnel-Syndrome-Fact-Sheet
However the median nerve is not a uniform cylinder, especially not in carpal tunnel syndrome. It changes in both shape and size as you move along the nerve from the forearm to the hand. One is therefore faced with a choice of levels at which one can pick a transverse section to measure.
http://carpal-tunnel.net/ultrasound/measure
Carpal tunnel syndrome (CTS) CTS is characterised by tingling, numbness, or pain in the distribution of the median nerve (the thumb, index, and middle fingers, and medial half the ring finger on the palmar aspect) that is often worse at night and causes wakening.
https://patient.info/doctor/carpal-tunnel-syndrome-and-median-nerve-lesions
Median nerve. The median nerve is a nerve in humans and other animals in the upper limb. It is one of the five main nerves originating from the brachial plexus. The median nerve originates from the lateral and medial cords of the brachial plexus, and has contributions from ventral roots of C5-C7(lateral cord) and C8 & T1 (medial cord). The median nerve is the only nerve that passes through the carpal tunnel. Carpal tunnel syndrome is the disability that results from the median nerve being pressed in the carpal tunnel.
https://en.wikipedia.org/wiki/Median_nerve
It was already known from CT and MRI imaging studies that the median nerve showed enlargement in CTS so the obvious first thing to try and measure with an ultrasound scanner was the size of the nerve, and this is where even the simplest approach to ultrasound of the carpal tunnel starts to get more complicated.
http://carpal-tunnel.net/ultrasound/measure
En español. Carpal tunnel syndrome (CTS) occurs when the median nerve, which runs from the forearm into the palm of the hand, becomes pressed or squeezed at the wrist. The carpal tunnel—a narrow, rigid passageway of ligament and bones at the base of the hand—houses the median nerve and the tendons that bend the fingers.
https://www.ninds.nih.gov/Disorders/Patient-Caregiver-Education/Fact-Sheets/Carpal-Tunnel-Syndrome-Fact-Sheet
The median nerve is the nerve that travels down the arm into the hand. With CTS, the nerve is squeezed as it passes through the narrow path (or tunnel) at the wrist. To enter the hand, the median nerve must pass through the narrow opening at the wrist joint.
https://carpaldoctors.com/carpal-tunnel-syndrome/
Bowing of the transverse carpal ligament - moving away from the median nerve we can look at the shape or size of the carpal tunnel itself, or especially at the extent to which the transverse carpal ligament bulges outside a straight line drawn between its bony attachments at either end.
http://carpal-tunnel.net/ultrasound/measure
CTS results from compromise of median nerve function at the wrist, caused by increased pressure in the carpal tunnel, an anatomical compartment bounded by the bones of the carpus and the flexor retinaculum.
https://patient.info/doctor/carpal-tunnel-syndrome-and-median-nerve-lesions
What is Carpal Tunnel Syndrome. Carpal Tunnel Syndrome (CTS) is a condition caused by a narrowing of the carpal tunnel causing a compression of the structures within the tunnel, including the median nerve. This compression of the median nerve is what causes the uncomfortable symptoms of tingling, numbness and pain.
https://carpaldoctors.com/carpal-tunnel-syndrome/
what is the median nerve at carpal tunnel
The median nerve is the only nerve that passes through the carpal tunnel.