Mosaicism
Mosaicism occurs when a child is born with an extra chromosome in some but not all of their cells. People with mosaic Down syndrome tend to have fewer symptoms than those with trisomy 21.

Translocation
In this type of Down syndrome, children have only an extra part of chromosome 21. There are 46 total chromosomes. However, one of them has an extra piece of chromosome 21 attached.

The clinical symptoms of cri du chat syndrome usually include a high-pitched cat-like cry, mental retardation, delayed development, distinctive facial features, small head size (microcephaly), widely-spaced eyes (hypertelorism), low birth weight and weak muscle tone (hypotonia) in infancy. The cat-like cry typically becomes less apparent with time.

Most individuals who have cri du chat syndrome have difficulty with language. Half of children learn sufficient verbal skills to communicate. Some individuals learn to use short sentences, while others express themselves with a few basic words, gestures, or sign language.

Other characteristics may include feeding difficulties, delays in walking, hyperactivity, scoliosis, and significant retardation. A small number of children are born with serious organ defects and other life-threatening medical conditions, although most individuals with cri du chat syndrome have a normal life expectancy.

Both children and adults with this syndrome are usually friendly and happy, and enjoy social interaction.

Social interaction and communication problems: including difficulties in normal back-and-forth conversation, reduced sharing of interests or emotions, challenges in understanding or responding to social cues such as eye contact and facial expressions, deficits in developing/maintaining/understanding relationships (trouble making friends), and others.

Restricted and repetitive patterns of behaviors, interests or activities:
hand-flapping and toe-walking, playing with toys in an uncommon way (such as lining up cars or flipping objects), speaking in a unique way (such as using odd patterns or pitches in speaking or “scripting” from favorite shows), having significant need for a predictable routine or structure, exhibiting intense interests in activities that are uncommon for a similarly aged child, experiencing the sensory aspects of the world in an unusual or extreme way (such as indifference to pain/temperature, excessive smelling/touching of objects, fascination with lights and movement, being overwhelmed with loud noises, etc), and others.  

The Centers for Disease Control and Prevention (CDC) have identified possible red flags for autism spectrum disorder in young children, including:

Not responding to his/her name by 12 months of age

Not pointing at objects to show interest by 14 months

Not playing "pretend" games by 18 months

Avoiding eye contact or preferring to be alone

Getting upset by minor changes

Flapping their hands, rocking their body or spinning in circles

Having unusual and sometimes intense reations to the way things smell, taste, feel and/or look

自閉症兒童的腸道微生物組組成與非自閉症兒童的腸道微生物組成有很大不同，其中五種細菌種類在很大程度上解釋了這種差異。 這些細菌標記物識別自閉症的敏感性超過 80%。
幾種梭狀芽孢桿菌在自閉症兒童中富集。 梭菌屬通過產生可損害中樞神經系統的梭菌毒素而與自閉症有關。
與神經遞質活動相關的細菌在自閉症兒童中顯著減少。
腸道菌群的數量和豐度會隨著年齡的增長而增長，但自閉症兒童的腸道菌群發育異常，落後於同齡人。

Huntington's disease symptoms can develop at any time, but they often first appear when people are in their 30s or 40s. If the condition develops before age 20, it's called juvenile Huntington's disease.

Eventually, thalidomide use during early pregnancy was found to cause birth defects. A variety of abnormalities were reported, but the most common was phocomelia.

Because of these side effects, thalidomide was withdrawn as a pregnancy drug in 1961. But babies with thalidomide-related conditions were born until 1962. It’s caused birth defects in more than 10,000 babies around the world.

Today, the drug is used for conditions like Crohn’s disease, multiple myeloma, and leprosy. If you receive a prescription for thalidomide, it’s important to make sure you’re not pregnant.

1p36 deletion syndrome is caused by a deletion of genetic material from the short arm or p arm of chromosome 1. The condition affects approximately 1 in 5,000 newborns and is the most common terminal chromosomal deletion in humans. The signs and symptoms depend on the extent of the deletion, which varies among the affected individuals. Some common signs of this syndrome include distinctive facial features, delay in development, intellectual disability, seizures, vision and hearing problems, congenital heart defects, and renal abnormalities.

2q37 deletion syndrome is a rare genetic disorder caused by the deletion of genes, at a location 2q37 of the long arm of chromosome 2. Developmental problems, intellectual and adaptive behavior problems, obesity, and bone deformities are some common signs of this condition.

Many children with Russell-Silver syndrome have a small, triangular face with distinctive facial features including a prominent forehead, a narrow chin, a small jaw, and downturned corners of the mouth. Other features of this disorder can include an unusual curving of the fifth finger (clinodactyly), asymmetric or uneven growth of some parts of the body, and digestive system abnormalities. Russell-Silver syndrome is also associated with an increased risk of delayed development, speech and language problems, and learning disabilities.

7. 應在整個活動度上以緩慢的收縮速度進行阻力訓練，包括向心和離心肌肉收縮。離心訓練可以減少共同收縮並改善淨扭矩的產生。

8. 對於非常虛弱或選擇性運動控制較差的人，單關節和單側訓練可能比多關節和雙側訓練更有效，因為它們會阻止其他肌肉群的代償。

9. 應該嘗試不同的阻力練習和方法（例如，自由重量，阻力帶，舉重器械）來活化適當的肌肉群和適當的阻力以使肌肉超負荷。

10. 在開始使用自由重量進行開放式動力鏈增強訓練之前，請務必檢查原始反射對功能的影響（即頭部，軀幹和近端四肢關節的姿勢與位置）以及個人是否具有足夠的神經運動控制能力來進行自由重量訓練。

11. 頭部，軀幹和近端四肢關節的位置要良好，來控制持續的原始反射。必要時，應使用價格便宜的修正附件，例如Velcro手套等，以便將手固定在設備上，以確保良好的姿勢。

12. 患有腦性痲痺的個體由於不活動和相關狀況（即異常的肌張力，攣縮和關節痛）的發生率較高，因此可能更容易有過度使用的傷害

 

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