Causes Of Lower Cranial Nerve Palsies

Drg Neuron Bone

Lower cranial nerve palsies seldom occur in isolation. Investigations include CT or MR imaging of the skull base. If negative, specific tests for systemic causes and EMG (for nerve and muscle disease) may be required. meningioma, neurofibroma, metastasis, epidermoid, nasopharyngeal carcinoma Bone lesions - osteomyelitis (in diabetics, consider pseudomonas), chordoma Basal meningitis (especially tuberculous) Carcinomatous meningitis Glomous jugulare tumour (chemodectoma) Brain stem Infarction...

Movement disorders extrapyramidal system

Nigral Dopamine Producing

The observation that drugs such as reserpine and phenothiazines regularly produce extrapyramidal syndromes has clarified the neurochemical basis of movement disorders and delineated the role of neurotransmitters. Neurotransmitter substances are synthesised and stored presynaptically. When released by an appropriate stimulus they cross the synaptic gap and combine with specific receptors of the postsynaptic cell, e.g. - acetylcholine - serotonin - Synthesised by small striatal cells -...