Thumb twitching is not normal if you thumb twitchs you may want to consult a doctor.
Median Nerve belongs to Brachial Plexus.
the brachial plexus means a network of nerves that supply the upper limb[arm,forearm and hand] in human.
Brachial plexus palsy is paralysis associated with compression/tearing of a group of nerves called the brachial plexus. The nerves can become compressed or torn when the neck is stretched.
Pain between the thumb and index finger can be caused by an injury, such as a fall. It can also rarely be a symptom of carpal tunnel syndrome or a sign of over-stretching.
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ABI = ankle/ brachial index. It is a screen for vascular disease. The blood pressure is measured at the ankle and the arm (brachial artery) and the ratio calculated. Normal is about 1.1 and less than 0.9 is considered abnormal.
The blood flows from the axillary artery into the brachial artery. The brachial artery has a branch called the deep brachial artery. The brachial artery branches into the radial and ulnar arteries. These artiers combine at the wrist forming the superficial palmar arch and the deep palmar arch.
Radial (on the wrist, on the side of the thumb) Femoral (on the groin area) Carotid (on the neck, on either side. not both at once.) Brachial (mostly in infants, on the inside of the arm) Dorsalis Pedis (on the top of the foot) Posterior Tibial (on the inside part of your foot, in back of the bony part) And you can also check on the Ulnar artery, which is on your wrist, on the side of the pinky, but it's not that good there)
Information provided states that an ankle brachial index would be needed it a doctor suspects that there may be artery disease. The levels that appear in the results will clarify how severe the problem is with a high count meaning no blockage but a low count meaning severe blockage.
For infants you can check the pulse by using the apical pulse, or heart beat with a stethascope, or using your index and middle finger to feel for a brachial pulse on the upper inside area of the arms.
About the size of your index finger to your wrist!
brachial
The carotid artery, but this is only for an unconscious adult. For all other instances use the brachial artery located on the wrist.
on your wrist or neck. put your index and middle finger on the underside of your wrist or same two fingers on the side/front of your neck.
brain to the spinal cord through the brachial plexus to ulnar nerve to little finger
Take your index and middle finger and touch them on your wrist or the side of your throat.