Which benzodiazepine reduces skeletal muscle tone at the spinal level?

Which benzodiazepine reduces skeletal muscle tone at the spinal level?

• A. Lorazepam
• B. Diazepam
• C. Midazolam
• D. Remimazolam

Answer: (B)

Benzodiazepines reduce skeletal muscle tone by boosting GABA-A receptor activity in the spinal cord, which enhances inhibitory neurotransmission and lowers the excitability of motor neurons. Among these drugs, diazepam provides the most pronounced spinal-level muscle relaxant effect. Its actions in the spinal cord lead to stronger inhibition of stretch reflexes and reduced alpha motor neuron activity, and this is amplified by its long duration due to active metabolites, giving a reliable and sustained decrease in muscle tone. The other benzodiazepines also produce sedation and some muscle relaxation, but their effects on spinal-mediated muscle tone are typically less pronounced, making diazepam the best choice for achieving noticeable skeletal muscle relaxation at the spinal level.

Benzodiazepines reduce skeletal muscle tone by boosting GABA-A receptor activity in the spinal cord, which enhances inhibitory neurotransmission and lowers the excitability of motor neurons. Among these drugs, diazepam provides the most pronounced spinal-level muscle relaxant effect. Its actions in the spinal cord lead to stronger inhibition of stretch reflexes and reduced alpha motor neuron activity, and this is amplified by its long duration due to active metabolites, giving a reliable and sustained decrease in muscle tone. The other benzodiazepines also produce sedation and some muscle relaxation, but their effects on spinal-mediated muscle tone are typically less pronounced, making diazepam the best choice for achieving noticeable skeletal muscle relaxation at the spinal level.