# @science on Instagram

- **Type:** Image
- **Original URL:** https://www.instagram.com/p/DTLsUHFkxWG
- **Gondola URL:** https://gondola.cc/posts/38651288-science-instagram
- **Thumbnail:** https://img.gondola.cc/tr:w-,h-,fo-auto/postThumbnails/afcadbd9ef.jpg
- **Posted:** 2026-01-06T20:30:14.000+00:00
- **Account Owner:** Science 🧬 (@science) — https://gondola.cc/science

## Caption

ADHD, also called attention-deficit disorder, is a behavior disorder, usually first diagnosed in childhood, that is characterized by inattention, impulsivity, and, in some cases, hyperactivity. These symptoms usually occur together; however, one may occur without the other(s).⁠
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The symptoms of hyperactivity, when present, are almost always apparent by the age of 7 and may be present in very young preschoolers. Inattention or attention-deficit may not be evident until a child faces the expectations of elementary school.⁠
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There are three major types of ADHD:⁠
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- ADHD, combined type. This, the most common type of ADHD, is characterized by impulsive and hyperactive behaviors as well as inattention and distractibility.⁠
- ADHD, impulsive/hyperactive type. This, the least common type of ADHD, is characterized by impulsive and hyperactive behaviors without inattention and distractibility.⁠
- ADHD, inattentive and distractible type. This type of ADHD is characterized predominantly by inattention and distractibility without hyperactivity.⁠
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#adhd #focusing #focus #biology #science #dna

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## Tags

science, adhd, focus, focusing, dna, biology

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