Spasticity

Increased involuntary muscle contraction (the opposite of hypotonicity). Spasticity is a condition in which certain muscles are continuously contracted. This contraction causes stiffness or tightness of the muscles and may interfere with movement, speech, and manner...

Speculum

An instrument for enlarging the opening of any canal or cavity in order to facilitate inspection of its interior. An instrument for enlarging the opening of any canal or cavity in order to facilitate inspection of its interior.

Sphenoid Sinus

Either of two irregular cavities in the body of the sphenoid bone that communicate with the nasal cavities. Sinus (cavity lined with mucosa) that lies directly behind the nose and in front of the pituitary gland – the back wall of which makes up the anterior...