Median nerve, median nerve neuropathy (neuritis)
Median nerve (n. medianus) — is mixed in the functions (also responsible for movement and sensitivity) of the nerve. Median nerve is composed of fibers of spinal nerves C5, C6, C7, C8 and T1, passing in the mainly middle and lower trunks of the brachial plexus. Later fibers of the median nerve pass to the external and internal beams. The waste from the external beam of the upper leg of the median nerve and the internal beam of the bottom of his foot merge, forming a loop of the median nerve.
Damage to the median nerve (median nerve neuropathy or neuritis) causes a impairment of sensitivity in the I, II and III fingers.
With the damage of the C7 spinal nerve or middle trunk of brachial plexus function of the median nerve is suffering partly as a result of the weakening observed folding brush, its rotation inside, combined with a lesion of radial nerve. Almost the same loss of function of the median nerve occurs in lesions of the external beam of brachial plexus, which pass from the middle trunk of the nerve fibers of the upper legs, but in conjunction with the damage of musculocutaneous nerve.
If it affects the spinal nerves C8-Th1, the lower trunk and the internal part of the brachial plexus (Dejerine Klumpke's syndrome) suffer in combination with the damage of the ulnar nerve, those of the median nerve fibers that make up the bottom of his foot (the weakening of the flexor muscles of the fingers, and tenor).
Motor function of the median nerve is mainly composed by rotating brushes inside, bending the brush in his hand due to a restriction of the muscle, flexing his fingers, mostly I, II and III, unbending middle and terminal phalanges of fingers II and III.
Place the compression of the median nerve at tunnel syndrome at carpal tunnel.
Median nerve's sensory fibers innervate the skin of the palmar surface of the I, II, III and IV of the radial half of the fingers, the corresponding portion of the palm, as well as leather rear end of the phalanges.
If it affects the median nerve (median nerve neuropathy or neuritis) suffers from the rotation of the brush inside, weakened by palmar flexion of wrist, broken bending I, II and III fingers and unbending middle phalanges II and III fingers.
Superficial sensitivity in median nerve neuropathy (neuritis) at the wrist is redused in the free zone of innervation of the ulnar and radial nerves. Joint-muscular sense in neuritis of the median nerve is always violated in the terminal phalanx of the index, and often the fingers II.
Diagnosis of the median nerve damage level in neuropathy (neuritis) produced by ENG.
Muscle atrophy in lesions of the median nerve are expressed most clearly in the tenor. Arising as a result of the flattening of the palm and thumb to bring up close and in one plane to the arrow creates a peculiar situation brush, which is called "monkeypox". Pain in median nerve damage especially partial, rather intense and often take causalgia character. In the latter case the position of the brush can acquire a whimsical character.
As frequent and characteristic lesions of the median nerve and vasomotor, secretory, trophic disorders: skin, especially I, II and III fingers become cyanotic or pale coloration, becoming "dull, brittle and streaked nails, there is skin atrophy, thinning of the fingers (especially II and III), disorders of sweating, hyperkeratosis, hypertrichosis, ulceration, etc. These disorders like pain, are more pronounced with the partial, rather than the full lesion of the median nerve.
Their first branches of the median nerve, as well as the ulnar nerve, giving only the forearm, so the clinical picture with a high lesion him all the way from the armpit to the upper arm is the same. If it affects the median nerve in the middle third of forearm rotation function of the brush inside, palmar flexion and wrist flexion middle phalanges are not affected.
The use of acupuncture is very effective in the treatment of the median nerve neuropathy (neuritis).
At lower nerve damage may persist and function of bending the terminal phalanges I, II and III fingers and then all the symptoms of restricted muscle involvement tenor and worm-like muscles and impaired sensation in a typical zone.
The main tests for determining the movement disorders that occur in lesions of the median nerve (median nerve neuropathy or neuritis):
- When you compress your hands into a fist I, II and part III fingers do not bend.
- Flexion of the terminal phalanges of the thumb and forefinger is not possible, as well as scratching, finger firmly on the table at the adjacent brush.
- When the sample thumb patient can not hold a strip of paper bent thumb and will keep it rectified by bringing the thumb adductor saved from the ulnar nerve.
Elimination of pain, tingling and restoration of sensitivity in the fingers in the treatment of the median nerve neuropathy (neuritis) is accelerated by the use of physiotherapy.
Treatment options for the median nerve neuropathy (neuritis) is chosen individually in each case. It includes a set of conservative procedures:
- stimulation of nerve and muscle
- vitamins (B, C and E)
- antiviral drugs
- homeopathic remedies
- surgery (neurolysis, nerve trunk cross-linking, etc.)
In treatment of median nerve neuropathy (neuritis) caused by carpal tunnel syndrome for removal of pain, tingling and paresthesia in the fingers accelerated by the use of physiotherapy.
If you have any questions, you can ask them to our neurosurgeon or neurologist: (499) 130–08–09
- Carpal tunnel syndrome
- Cubital tunnel syndrome
- Eyeball and visual pathway:
- Peripheral neuropathies (neuritis):
- Facial nerve neuropathy (neuritis), Bell's palsy
- Median nerve neuropathy (neuritis)
- Peroneal nerve neuropathy (neuritis)
- Radial nerve neuropathy (neuritis)
- Sciatic nerve neuropathy (traumatic neuritis)
- Tibial nerve neuropathy (neuritis)
- Trigeminal nerve neuropathy (traumatic neuritis)
- Ulnar nerve neuropathy (neuritis)
- Neuropathy and polyneuropathy (alcoholic, diabetic)
- Optic nerve and retina diseases:
- Opto-chiasmatic arachnoiditis (optic chiasm)
- Pain in the arm and neck (trauma, osteochondrosis)
- Sciatica, leg pain (hernia and protrusion of the disc)
- Traumatic neuropathies (neuritis)
- Trigeminal neuralgia
- Tumors of peripheral nerves