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EMG Cheat Sheet. Basics of EMG: Despite the countless number of causes, there are only 4 pathologic responses to nerve injury: Primary neuronal degeneration or “neuronopathy” Segmental demyelination. Wallerian degeneration in response to axonal interruption. Axonal degeneration or “axonopathy”
For the 2nd (optic) cranial nerve, visual acuity is tested using a Snellen chart for distance vision or a handheld chart for near vision; each eye is assessed individually, with the other eye covered.
trigeminal nerve (CN V) and the facial nerve (CN VII) are both mixed nerves, that is; they carry both motor and sensory fibers. In the EMG lab, lesions of the facial nerve are fairly common,
5 gru 2013 · Visual acuity. As refractory errors are not part of cranial nerve examination, the patient should use any optical aids to which they are accustomed. A hand-held eye chart or a Snellen chart can be used. During the examination, one eye should be completely covered with a small card.
6 maj 2023 · Cranial Nerve V. Common trigeminal nerve pathologies include trigeminal neuralgia, cluster headache, and lateral medullary or Wallenberg syndrome. Trigeminal neuralgia presents as neuropathic, shock-like facial pain within the trigeminal dermatomal distribution (V2 and V3 divisions).
Identify pattern of nerve conduction studies that are abnormal to make diagnosis; i.e. sural, peroneal motor, and tibial motor amplitude loss in lumbosacral plexopathy
1 lis 2020 · Electrodiagnostic testing helps to precisely locate disease processes affecting the peripheral nervous system (including peripheral nerves, neuromuscular junctions, and muscles) and has limited use in the evaluation of central nervous system disorders.
