Laughing for no reason



It is one of the automatic diseases that laughs and laughs for no reason. It is a common symptom of schizophrenia. A no-sentence laugh is a spontaneous, unprovoked, unmotivated, uninteresting experience, a sudden, empty smirk, and a smirk. At the same time, with certain disturbances of consciousness, it is a form of seizures. Some also have muscle relaxation and fall after the attack. Mostly thalamic lesions. Divided into mandatory crying laughter, also known as pathological crying, smirk, strong laughter, paroxysmal laughter, smirk, bitter laughter, laughter, giggles, laughter, pathological laughter and crying, laughter type epilepsy.



Common symptoms of schizophrenia.


an examination

Related inspection

EEG examination facial nerve examination

It is a smirk of emptiness that is spontaneous, unmotivated, and has no inner experience.

Schizophrenia: apathy, dullness, emotional dissonance (inappropriate), and emotional inversion or ridicule.


Differential diagnosis

Several pathological smiles:

A laughter episode is a kind of mad laughter with no cause and sudden onset, accompanied by a certain disturbance of consciousness, which is a form of seizure. Some have muscle relaxation and quenched after the attack. Mostly thalamic lesions.

Mandatory crying and laughing, also known as pathological crying, is a spontaneous, rigid, inanimate laugh that has no obvious cause and is incompatible with objective reality. His expressions began to smile from smile to laughter, lasting longer, slower recovery, and lacking the corresponding inner experience. It is a symptom of organic brain lesions. More common in basal ganglia and high brain stem damage.

Smirking: It is a special sneer. More common in patients with brain hypoplasia and senile dementia. This kind of laugh is not self-made, without any stimulation, can appear under any circumstances, no emotional color, so the patient is often happy, but due to the influence of intelligent obstacles, facial expressions give people a feeling of stupidity, no infection force.

Smirk: more common in patients with occult depression. Originally, such patients are depressed in their hearts, but often smirk at people, and experienced doctors often find it.

Strong laugh: Strong laughter is a kind of laugh that can't be restrained. It is more common in patients with brain organic diseases such as senile diffuse cerebral arteriosclerosis. Cranial trauma and brain tumors can also be caused.

Paroxysmal laughter: manifested as paroxysmal inability to laugh spontaneously, many people attack several times to dozens of times a day, from a few days to several weeks, each episode lasts tens of seconds to several minutes, is a laugh Characteristics of sexual epilepsy. In addition to laughter, the disease is often accompanied by ADHD, EEG changes (indefinite duration) and varying degrees of disturbance of consciousness.

Idiot: I am seen in patients with schizophrenia. Because of the abnormal function of the brain, when you laugh, you can sneer alone or laugh. For youthful schizophrenia, smirking is an important feature. But this kind of emotional instability, sometimes suddenly converging smiles, serious expressions; sometimes it is laughable and embarrassing.

Wry smile: common in tetanus patients, this laugh is not from the patient's heart, but a destructive pathological manifestation, because the sputum toxin secreted by tetanus bacillus first invades the facial muscles, causing it to contraction. of. Laughter is accompanied by symptoms such as tightness of the jaws, rigidity of the limbs and reversal of the horns.

Laughing: The hysterical madness or rickets presented a hysterical laughter, laughter and arrogance, and rushed to the sand.

The ridiculous laugh is a kind of squinting and a strange smile on the face of a patient with facial paralysis and paralysis.

Laughing down: more common in infants and young children under 2 years old, also in the neonatal period. The child often has no incentive to smile, or laughs after teasing, and at the same time, the whole body is weak, then falls to the ground, and stops laughing for half a minute, and can stand up. It can be dozens of times a day.

Pathological laughter and crying: Severe brain organic damage, such as cerebral arteriosclerosis, brain tumors, encephalitis, multiple sclerosis, etc., sometimes pathological laughter. If there is a person with a brain disorder, there is no reason to laugh, often a signal that the disease is heavier, and should be treated in time.

Laughing epilepsy: There is a seizure that cannot be controlled by self-control. It occurs 3 to 5 times a day. Each duration lasts from a few seconds to tens of seconds. The attack time is irregular, and there is no obvious aura before the attack.

It is a smirk of emptiness that is spontaneous, unmotivated, and has no inner experience.

Schizophrenia: apathy, dullness, emotional dissonance (inappropriate), and emotional inversion or ridicule.

Was this article helpful?

The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments.