Spasticity is a feature of altered skeletal muscle performance with a combination of paralysis, increased tendon reflex activity and hypertonia. It is also colloquially referred to as an unusual “tightness”, stiffness, or “pull” of muscles.

Clinically, spasticity results from the loss of inhibition of motor neurons, causing excessive velocity-dependent muscle contraction. This ultimately leads to hyperreflexia, an exaggerated deep tendon reflex. Spasticity is often treated with the drug baclofen, which acts as an agonist at GABA receptors, which are inhibitory.

Medical Marijuana Efficacy

A review by Shaheen Lakhan, PhD, and Marie Rowland, PhD, of the Global Neuroscience Initiative Foundation in Los Angeles, found that five of six published studies they analyzed reported a reduction in spasticity and an improvement in mobility in MS patients treated with marijuana extracts.

“We found evidence that combined THC and CBD extracts may provide therapeutic benefit for MS spasticity symptoms,” Lakhan said in a news release.