Different Brains

ADHD

Regulation, not a deficit of attention

The name is misleading. Attention is not absent in ADHD — it is poorly regulated, which is why the same person can be unable to begin a routine task and simultaneously capable of absorbed focus for hours on something engaging. What is affected is the capacity to direct attention deliberately rather than have it captured.

Presentation varies considerably. Some people are visibly restless. Others are quietly inattentive — losing the thread of conversations, beginning things and not completing them. Many adults, women in particular, were never identified in childhood because their presentation was internal rather than disruptive, and they were described as scattered or underachieving instead.

Emotional dysregulation is part of the condition and is frequently the most impairing element: intense responses, low frustration tolerance, difficulty recovering from disappointment. It is also the part least often recognized as belonging to ADHD rather than to character.

Autism spectrum

Differences in social processing and sensory experience

Autism involves differences in social communication alongside restricted or repetitive patterns of behavior and interest. The range is genuinely wide: some autistic people are nonspeaking and require substantial daily support; others are highly verbal, work in demanding roles, and go unidentified for decades. A single description will not fit both, and neither picture should be taken as the whole.

Sensory experience is frequently more intense. Input that others filter automatically — the hum of a light, the texture of a fabric, a crowded room — can be genuinely overwhelming. Social exchange that others navigate without thinking often requires conscious decoding, which is effortful and cumulatively exhausting. The depletion that follows sustained social effort is a recognized feature rather than a personality trait.

Support is not aimed at producing a person who appears non-autistic. It is aimed at accurate self-understanding, at navigating environments that were not built with these differences in mind, and at reducing the cost of the accommodation the person is already making.

Specific learning disorders

Dyslexia, dyscalculia, dysgraphia

These affect the acquisition or use of particular academic skills — reading, writing, or mathematics — despite adequate intelligence, instruction, and opportunity. They reflect differences in how specific types of information are processed.

Dyslexia affects reading: decoding, fluency, spelling. Dyscalculia affects number sense and arithmetic. Dysgraphia affects written expression. Many people with these conditions are highly intelligent and have spent years believing otherwise, because the difficulty was visible and its cause was not.

Language disorder

Difficulty with language itself

This involves persistent difficulty acquiring and using language — vocabulary, sentence structure, and the capacity to communicate effectively. It concerns language as such, not accent, dialect, or bilingualism.

A child may struggle to retrieve words, complete a thought, or follow what is being said, with hearing entirely intact. Because nearly all learning is mediated by language, the effects extend well past communication into academic progress, social development, and self-concept.

Intellectual developmental disorder

Reasoning and adaptive functioning

This involves significant limitations in intellectual functioning — reasoning, problem-solving, learning — together with adaptive behavior, the practical and social skills used daily. It originates during development.

Severity ranges widely. Many people with the milder end live independently, work, and maintain full social lives. Others require substantial ongoing support and do well when it is properly matched. What is shared is not a ceiling on what is possible but a need for support calibrated to a specific profile of strengths and difficulties.

Accurate assessment matters here in a particular way: the difference between mild intellectual disability, a learning disorder, and a language disorder determines what services a person qualifies for, and those determinations follow people for years.

Developmental coordination disorder

Sometimes called dyspraxia

This involves significant difficulty with motor coordination — planning and executing movement — sufficient to interfere with daily activity and academic work. Children are commonly described as clumsy, which misdescribes it. The difficulty is in motor planning, not in attention or effort.

Tasks other children absorb without instruction — handwriting, catching, riding a bicycle — may require sustained practice and never become fully automatic. The consequences extend past the physical: avoidance of sport and play affects social development and confidence as much as the coordination itself does.

Tic disorders and Tourette syndrome

Involuntary movement and vocalization

Tics are sudden, repetitive movements or vocalizations, involuntary in the relevant sense — they can sometimes be suppressed briefly, at the cost of mounting tension that eventually requires release. Common motor tics include blinking, head movement, and shoulder shrugging; common vocal tics include throat clearing and sniffing.

Tourette syndrome requires both motor and vocal tics persisting over a year. The popular association with involuntary swearing is badly misleading — coprolalia affects only a small minority, and its prominence in depiction has made the condition harder for everyone else who has it.

Tics frequently co-occur with ADHD and OCD, and often diminish considerably in adulthood. Where treatment is indicated, behavioral approaches developed specifically for tics are effective, with medication in some cases.

Diagnosis in adulthood

What tends to be missed, and what it costs

These are among the more commonly missed presentations in adult practice. ADHD is frequently treated as anxiety or depression. Autism in adults, particularly in women, is regularly not considered at all. A learning disorder identified at forty explains a childhood that was attributed to laziness.

The cost of missing them is not only the years of unhelpful treatment. It is the account a person carries about themselves in the meantime, which is usually that they are failing at things other people manage easily.

Assessment in adulthood also has to distinguish what is developmental from what is psychiatric, and recognize where both are present — which is common. Attention difficulty, social withdrawal, and disorganization each have several possible sources, and the treatment implications differ entirely depending on which is operating.