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What (who) is jaw jerk - definition
Jaw jerk reflex
The jaw jerk reflex or the masseter reflex is a stretch reflex used to test the status of a patient's trigeminal nerve (cranial nerve V) and to help distinguish an upper cervical cord compression from lesions that are above the foramen magnum. The mandible—or lower jaw—is tapped at a downward angle just below the lips at the chin while the mouth is held slightly open.
Hypnic jerk
INVOLUNTARY TWITCHES
Sleep start; Hypnagogic jerk; Hypnogogic jerk; Hyngaogic jerk; Nap jerk; Hypnic Jerk; Night start; Night starts; Nod-and-jerk; Nod and jerk; Hypnagogic myoclonic twitch; Motor start; Sleep jerk; Sleep-start; Hypnic myoclonia; Sleep myoclonus
A hypnic jerk, hypnagogic jerk, sleep start, sleep twitch, myoclonic jerk, or night start is a brief and sudden involuntary contraction of the muscles of the body which occurs when a person is beginning to fall asleep, often causing the person to jump and awaken suddenly for a moment. Hypnic jerks are one form of involuntary muscle twitches called myoclonus.
Jaw-thrust maneuver
The jaw-thrust maneuver is a first aid and medical procedure used to prevent the tongue from obstructing the upper airways. This maneuver and the head-tilt/chin-lift maneuver are two of the main tools of basic airway management, and they are often used in conjunction with other basic airway techniques including bag-valve-mask ventilation.
