Spasticity is a velocity-dependent increase in muscle tone in response to passive movement. Pyramidal tract injury doesn't give rise to spasticity. Rather, the main symptoms are weakness and loss of dexterity which is greater in distal than in the proximal muscles. The pyramidal tract is the system which balances muscle tone.

Spasticity is a common symptom and feature of several neurological conditions. The severity of spasticity can range from a minor inconvenience to a significant disruption of your day-to-day life. The good news is that there are several treatment options for spasticity.

'Spasticity is a motor disorder characterised by a velocity-dependent increase in tonic stretch reflexes (muscle tone) with exaggerated tendon jerks, resulting from hyperexcitability of the stretch reflex, as one component of the upper motor neurone syndrome' More recently, a definition from Pandyan et al (2005) states that spasticity is:

2019年1月10日 · Extensor spasticity refers to muscle spasms on the front of the leg (the quadriceps) and the inside leg (the adductor muscles). Flexor spasticity refers to spasms...

For example, if you have extensor spasticity, refrain from doing the active exercises that straighten the hip and knee to the extent that it sets off the spasticity. It is important to remember that the positions in this section are designed to decrease your spasticity. If they do not, consult your physician or physical therapist.

Spasticity is a motor disorder marked by a velocity-dependent increase in muscle tone or tonic stretch reflexes associated with hypertonia. Colloquially, it is often referred to as “tightness” or “stiffness.”

People with MS can experience spasticity of the leg and hip muscles, resulting in flexor spasticity (legs and hips locked in a bent position) or extensor spasticity, where stiff muscles hold the legs straight and occasionally crossed at the ankles.

Clinically spasticity manifests as an increased resistance offered by muscles to passive stretching (lengthening) and is often associated with other commonly observed phenomenon like clasp-knife phenomenon, increased tendon reflexes, clonus, and flexor and extensor spasms.

Extensor spasticity: With extensor spasticity, it’s the opposite case. Your muscles are so tight that your limbs remain straight and are difficult to bend. Some degree of spasticity can be beneficial, particularly for people who experience significant leg weakness.

Spasticity is more often found in the flexor muscles of the upper limb (fingers, wrist, and elbow flexors) and in the extensor muscles of the lower limb (knee and ankle extensors). However, there are several exceptions.