Symptoms of Intellectual Disability in Children

Jul 06, 2022 Source: Cainiu Health

Dr. Xie Zixing

Introduction

Specific symptoms of intellectual disability in children include: - Difficulty feeding, inability to suckle, and frequent spitting up or vomiting—indicating possible neurological impairment that may adversely affect future intellectual development. - Abnormal facial features: Some infants with congenital intellectual disability exhibit distinctive facial or physical abnormalities. - Delayed speech development: Children with intellectual disability often show significant delays in language acquisition—typically lagging by four to five months, or even one to two years.

High-risk factors for intellectual disability in children include advanced maternal age, consanguineous marriage, a family history of intellectual disability, maternal infection during early pregnancy, abnormal delivery, or severe illness during the neonatal period or infancy. Specific symptoms are as follows:

① Difficulty with breastfeeding

This commonly occurs during infancy. One of the earliest signs observed in infants with intellectual disability is difficulty feeding—such as poor or absent sucking reflexes and frequent regurgitation—indicating possible neurological impairment that may adversely affect subsequent intellectual development.

② Abnormal facial features

Some infants with congenital intellectual disability exhibit distinctive facial and physical abnormalities. They often appear expressionless and unresponsive, lacking interest in their surroundings—a contrast to typically developing infants, who begin attending to environmental stimuli by one month of age. For example, children with Down syndrome commonly display widely spaced eyes (hypertelorism), upward-slanting palpebral fissures, a flattened nasal bridge, protruding tongue, and excessive drooling.

③ Delayed language development

Typically developing infants begin imitating sounds at 7–8 months, say “Dada” or “Mama” around 12 months, utter approximately ten words and follow simple commands by 18 months, ask basic questions by age 2, and express their thoughts coherently by age 3. In contrast, children with intellectual disability may lag behind by four to five months—or even one to two years—in achieving these milestones. Failure to attend to speech directed toward them should also be regarded as an early warning sign of intellectual delay.

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What Are the Manifestations of Intellectual Disability in Children?

Children with intellectual disability experience brain damage due to causes such as inborn errors of metabolism, prenatal or postnatal abnormalities, and postnatal illnesses, resulting in developmental delays compared with typically developing peers in areas including comprehension, language expression, and self-care abilities. Symptoms of intellectual disability include poor memory, slow perceptual processing, narrow perceptual range, and vague, inaccurate perception.

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What Are the Manifestations of Intellectual Disability in Children?

What are the manifestations of children with intellectual disability? Children with intellectual disability often exhibit poor attention due to incomplete brain development; they are unable to sustain focus on a single task for extended periods and are easily distracted. They are restless, constantly fidgeting in their chairs, and display incessant movement of their hands and feet. They may also demonstrate pronounced aggression—being easily irritated and impulsive—and may attack others without apparent cause, using behaviors such as biting people or objects or hitting others to vent their emotions.