extensor

extensor /ex·ten·sor/ (-ser) [L.]

1. causing extension.

2. a muscle that extends a joint.

---

ex·ten·sor (k-stnsr)

n.

A muscle that extends or straightens a limb or body part.

---

extensor

[L.] any muscle that extends a joint. See Table 13 for list of all muscles.

---

crossed extensor reflex

see crossed extensor reflex.

extensor postural thrust

a postural reflex reaction tested in small animals by lifting the patient off the ground, then lowering it to see whether the hindlegs are extended to make contact and support weight and several short steps are taken to maintain posture. Called also extensor reaction.

Extensor postural thrust response. By permission from Sharp NJH, Small Animal Spinal Disorders, Mosby, 2004

extensor process disease

see pyramidal disease.

extensor reaction

see extensor postural thrust.

extensor rigidity

see under upper motor neuron.