Atonic seizures, also called "drop attacks," are abrupt, with loss of muscle tone lasting one to two seconds, but with rapid recovery. Consciousness is usually impaired.
(also called "drop attacks"): These are characterized by sudden, limp posture and a brief period of unconsciousness and last for one to two seconds.
atonic type seizure
In drop attacks, the child falls suddenly to the ground. This may be because the legs suddenly fold up (atonic seizure) or stiffen (tonic seizures), or because of a violent jerk (myoclonic seizure) that throws the child to the floor.
atonic bladder
Atonic seizures are also called "drop attacks"
Atonic
The rapid loss of muscular tone could be limited to head and neck muscles, resulting in head drop, or it may be more extensive, involving muscles for balance and causing unexpected falls with physical injury.
Amyotonia - atonic condition of the muscles
H, hydrogen
correct
If you are referring to lack of or poor muscle tone then "hypotonia" is the correct medical term for low tone, and "atony" for absent tone.
neurogenic
seizure (medical) = hetkef (התקף) seizure (grabbing) = tfisah (תפיסה)