biology

Üner Tan

Üner Tan is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Üner Tan rather than just read about it. In short: Üner Tan (1 May 1937 – 6 February 2022) was a Turkish neuroscientist and evolutionary biologist. He is best known for his discovery and study of the human quadrupedal condition he named the Uner Tan syndrome.

Key takeaways

Üner Tan belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Üner Tan to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Üner Tan from memory before moving on to harder problems.

Reference excerpt

Üner Tan (1 May 1937 – 6 February 2022) was a Turkish neuroscientist and evolutionary biologist. He is best known for his discovery and study of the human quadrupedal condition he named the Uner Tan syndrome. He taught at Çukurova University until his retirement in 2004 and had previously taught at several other institutions.

Biography Tan was born in Ünye, Turkey. He graduated from secondary school in Çorum and started college at Ege University, at the Faculty of Medicine, in 1956. He continued at Göttingen University and graduated from there and the Max-Planck Institute in 1966. He returned to Turkey at 1969 and worked at Hacettepe University in Ankara, and Atatürk University in Erzurum, Black Sea Technical University in Trabzon and Çukurova University in Adana. Tan retired in 2004, and died in February 2022, at the age of 84.

Uner Tan syndrome

According to Tan, persons affected by this syndrome walk with a quadrupedal locomotion and are afflicted with "primitive" speech and severe mental retardation; he postulated that this is an example of backward evolution. He proposed the syndrome after studying the Ulas family of rural southern Turkey, five of whom have these symptoms. The proposed syndrome was featured in the 2006 BBC2 documentary The Family That Walks On All Fours. After his study of the Ulas family, Tan went on to diagnose Uner Tan syndrome in several other families. Neuroscientist and evolutionary psychologist Roger Keynes, psychologist Nicholas Humphrey and medical scientist John Skoyles have argued that the gait of these individuals is due to two rare phenomena coming together, not atavism. First, instead of initially crawling as infants on their knees, they started off learning to move around with a "bear crawl" on their feet. Second, due to their congenital brain impairment, they found balancing on two legs difficult. Because of this, their motor development was channeled into turning their bear crawl into a substitute for bipedalism. In the BBC documentary The Family That Walks On All Fours, Nicholas Humphrey refers to Uner Tan's "devolutionary" description of the Ulas family as "scientifically irresponsible."

See also The Family That Walks On All Fours, documentary about the Ulas family VLDLR-associated cerebellar hypoplasia

References

External links Tan autobiography

Worked examples

Example 1 — a first encounter with Üner Tan

Start with the simplest possible case. Write down what Üner Tan claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Üner Tan before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Üner Tan ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Üner Tan

In research: Üner Tan appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Üner Tan in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Üner Tan is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1937 births, 2022 deaths, Evolutionary biologists, so understanding it makes those chapters shorter.
In everyday life: Look for Üner Tan outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Üner Tan in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Üner Tan means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Üner Tan out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Üner Tan in simple terms?

Why does Üner Tan matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Üner Tan?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Üner Tan.