Polydactyly

@botekilwxj0

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Why it worked

The video effectively uses clear, simple animations and on-screen text to explain complex biological traits in an easily digestible format. The "part 5" suggests a series, encouraging viewer retention and return for subsequent content.

Summary

The video discusses various rare human traits, starting with polydactyly (extra fingers/toes) and ectrodactyly (lobster claw syndrome). It then moves to handedness, explaining left-handedness and the rarity of true ambidexterity, linking it to brain symmetry. Finally, it covers anonychia (absence of nails) and hypermobile joints.

Structure

1Introduction to polydactyly and ectrodactyly
2Discussion of handedness and ambidexterity
3Explanation of anonychia
4Description of hypermobile joints

On-screen text

Polydactyly Polydactyly BORN OR ACTUALLY OCCURRING 1 in 700 TO 1 in 1000 BIRTHS CASES JUST SKIN BONE Ectrodactyly (Lobster Claw Syndrome) CLAW WHERE OR SPLITTING FOOT CLAW OCCURS 1 in 90,000 90,000 AFFECT ALL LIMBS HANDEDNESS Left Hand Right Hand 10% ABOUT 10% AMBIDEXTERITY BUT AMBIDEXTERITY EQUAL PREFERENCE RATHER 1% of the population ESTIMATED 1% RARER HANDED AMBIDEXTERITY LEFT-HANDED ACTUALLY SYMMETRICAL HANDEDNESS TIED BEING MOVING FULL GRANTED anonychia RARE CONDITION BORN COMPLETE OF ABNORMALITIES LIKE FINGERS NAILS WITH NAILS PROTECT FINGERS PEOPLE ARE WITHOUT NAILS INJURY THOSE LIFETIME JOINTS OR HYPERMOBILE COMMON HARmless BEND WRISTS EXTEND

Original caption

#rarest #human #DidYouKnow #LearnOnTikTok #fyp

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Transcript

Polydactyly being born with extra fingers or toes. Actually occurring 1 in 700 to 1 in 1000 births. Cases just skin. Bone. Ectrodactyly (Lobster Claw Syndrome) claw where or splitting foot claw occurs 1 in 90,000. Affect all limbs. Handedness. Left hand. Right hand. About 10% of the population. Ambidexterity. But true ambidexterity having equal skill and preference in both hands rather than one dominant side. 1% of the population estimated 1%. Rarer handed. Genuine ambidexterity is actually linked to a more symmetrical brain. Since handedness is normally tied to being one hemisphere being dominant for motor control. Some studies have found naturally ambidextrous people are slightly more likely to experience issues with memory and attention. True ambidexterity is common among elite fencers, boxers and baseball switch hitters since being able to switch hands seamlessly removes entire predictability that opponents rely on. Moving on. Nails. Most people take a full set of fingernails for granted. But anonychia is a rare condition where a person is born complete of absence of nails on the fingers or toes. It stems from a mutation involved in nail bed development and can appear entirely on its own or alongside other limb abnormalities like underdeveloped fingers. Since nails normally protect the sensitive tips of fingers and toes people are injury. Those without nails are at higher risk of cuts, scrapes and infections over a lifetime. Joints. Being double jointed or having hypermobile joints is fairly common and often harmless. Letting some people bend their thumbs back to their wrists or hyper extend their elbows.