The clinical manifestations of petit mal epilepsy include absence seizures, absence with myoclonus, tonic seizures, atonic seizures, and absence with autonomic symptoms. During an absence seizure, the patient experiences a brief loss of consciousness, sudden cessation of ongoing activities, and abrupt halting of speech. The patient's face may turn pale, their expression may become strange, and occasional twitching of the mouth may occur. The episode typically lasts only a few seconds. In cases of absence with myoclonus, the patient may exhibit movements in the face or limbs in addition to the absence seizure, which can potentially lead to falls. During an atonic seizure, the patient experiences a sudden loss of muscle tone, making it impossible to maintain their previous posture. The patient may briefly lose consciousness or be in a state of impaired awareness.