Abstract
Botulinum toxin is a protein produced by Clostridium botulinum, which inhibits muscle contraction by transiently blocking the release of acetylcholine at the neuromuscular junction. At a neuromuscular junction, the toxin inactivates some of the fusion proteins, such as SNAP-25, syntaxin, or synaptobrevin, which are essential for cellular function. This process involves the temporary inhibition of presynaptic acetylcholine release; consequently, its effects are restricted to motor neurons that depend on the cholinergic transmission (muscular plate, gland innervating cells). Injections of botulinum toxin A have been shown to be useful in the treatment of etiologically diverse types of muscle spasms. Ultrasonography (USG) has been used as a guide for confirming muscle fasciculations and also is an effective tool for confirming precise needle positioning and correct drug placement. We describe a case of a 25-year-old man with meningomyelocele and paraparesis with painful muscle spasms in bilateral thighs treated by USG-guided botulinum toxin injection.
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