TICS in Children

TICS

Either vocalizations (sounds) or physical movements.  Sudden, fast, repetitive, and nonrhythmic motor movements are known as tics.  Sensation precedes premonitory need.  Anxiety is increased when tics are suppressed voluntarily or quickly. Tics are hence somewhat unconscious movements. Tics are minor or non-existent during focused work and sleep, and their intensity rises with tension, excitement, and tiredness.

Types of TICS

Broadly, tics are of two types: motor and vocal.

Motor TICS 

Motor tics are of two types: simple and complex.

Simple Motor TICS

Affect one or more muscles. Basic motor tics include jerking of the neck, forced blinking of the eyes, and basic shoulder shrugs.

Complex Motor TICS 

Affect one or more muscles. Basic motor tics include jerking of the neck, forced blinking of the eyes, and basic shoulder shrugs.

VOCAL TICS 

Simple Vocal TICS 

•  Simple meaningless sounds. 
• Clearing the throat 
• Repeated sniffing 

Complex Vocal TICS 

• Echallalia imitates what is stated by someone speaking in front of them.
• Coprolalia: when someone uses vulgar or offensive language in public.
• Palilalia is the practice of quickly repeating a sentence's final word after concluding it.

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Etiology Of TICS 

Cortico-striatal pathway: links between the striatum, basal ganglia, and frontal cortex. The dopamine, serotonin, and norepinephrine neurotransmitter systems are disrupted. The thalamocortical circuit connects the frontal cortex and thalamus.

Risk Factors for TICS

Gender: 2:1 to 4:1, with men >> women.  Stress alters the causal pathways and activates the hypothalamic-pituitary-adrenal axis excessively.  A favorable family medical history raises the risk by 10–100%.  The concordance rate is 30% for dizygotic twins and 80% for monozygotic twins.  There are several genetic involvements that are multifactorial.

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Role of Autoimmune Mechanisms in TICS and Related Disorders  

 A theory suggests that tics are precipitated in many people by autoimmune mechanisms brought on by infections.  For instance, tics or obsessive-compulsive disorder are brought on by Pediatric Autoimmune Neuropsychiatric Disorder Associated with Streptococcus Infection (PANDAS).  OCD is brought on by Paediatric Acute-onset Neuropsychiatric Syndrome (PANS).

Epidemiology Of TICS

 For men, the prevalence rate is 6–18%, whereas for women, it is 3-12%.  Compared to the black or Asian ethnic groups, the incidence is higher in the white or Caucasian population.

Clinical Course Of TICS

The severity peaks between the ages of 10 and 12;  The most common age of onset is between 4 and 6 years.  As patients age, the severity lessens; by the time they are 18 years old, 65% of patients have experienced a significant resolution.

Patients may have crippling instances of severe tics, such as waxing and fading of tics episodes, prior to remission.  IQ is within normal range. Nonetheless, kids could find it hard to concentrate on their education, which could affect their academic achievement.

Adult onset is uncommon. Tics in people over the age of 18, however, rule out drug-induced tics.  The most frequent and early manifestation of motor tics are neck jerks.  The most prevalent and early-onset vocal tics are throat-clearing movements.

Sequelae And Consequences of TICS   

Tiny and sporadic tics continue to go undiagnosed.  Severe tics, particularly those linked to Tourette syndrome, have a negative impact on life quality.  Limited social engagement.
Limited employability,  Isolated academic performance,  Medical problems –Injuries brought on by motor tics.

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Hope you found this blog helpful for your NEET SS Pediatrics Neurology Preparation. For more informative and interesting posts like these, keep reading PrepLadder’s blogs.