Mystery of Turkish siblings who move on all fours leaves scientists baffled
Walking on all fours might be fun for some, but for the members of one Turkish family, it’s the only way to move around, reports the Oddity Central.
Five siblings of the 19-member Ulas family, from Hatay Province, suffer from a rare disability – they lack the balance and stability required to stand up straight, forcing them to move on all four limbs. The family was discovered in 2005 – 14 of them appeared to be completely normal, while five suffered a quadrupedal gait. Scientists have been baffled by the condition ever since.
The Ulas siblings were featured in a BBC documentary film, The Family That Walks On All Fours, in 2006. The film revealed that of the five siblings, two sisters and a brother have only walked on all fours since birth. Another brother and sister sometimes manage to walk upright. “It’s amazing as an example of a strange, strange aberration of human development,” said Professor Nicholas Humphrey, who visited the family twice during the documentary. “But their interest is how they can live in the modern world.”
According to the film, a popular explanation for their unusual walk – similar to the movement of primates – was ‘reverse evolution’. Many scientists believed that the siblings were living proof that it is possible for humans to devolve. “I do not think they were destined to be quadrupeds by their genes, but their unique genetic make-up allowed them to be.” said Professor Humphrey.
“It has produced an extraordinary window on our past. It is physically possible, which no one would have guessed from the modern human skeleton. However they arrived at this point, we have adult human beings walking like ancestors several million years ago.” Recent studies, however, have disproved this theory. American scientists have now concluded that the walk is only an adaptation to a rare disorder.
A report published in the scientific journal PLOS One suggested that the siblings move laterally, unlike primates who walk in a diagonal sequence by repeatedly placing a hand on one side and a foot on the other. The siblings’ walk, on the other hand, is lateral and involves putting weight on the wrists instead of the knuckles. This is a clear sign of adaptation to cope with a loss of balance.
So scientists now believe that the gait could be a byproduct of a hereditary condition that causes cerebellar hypoplasia, which disturbs their sense of balance. The siblings may have developed quadrupedalism in order to adapt to the rare condition known as Uner Tan syndrome, named after the Turkish evolutionary biologist who first studied them.
“I was determined to set the record straight, because these erroneous claims about the nature and cause of quadrupedalism have been published over and over again, without any actual analysis of the biomechanics of their gait, and by researchers who are not experts in primate locomotion,” said lead researcher Liza Shapiro, from the University of Texas. “We have shown that the quadrupedalism resembles that of healthy human adults asked to walk quadrupedally in an experimental setting.”
Previously, biologist Uner Tan had suggested that people affected by this syndrome walk with a quadrupedal locomotion, and are also affected by primitive speech and severe mental retardation. During his first study, when he asked the siblings what year it was, each of them had five different responses: “80,” “90,” “animals,” “July,” and “house.” This, according to Tan, indicated reverse evolution.
Videos
Interview with Francis Malige, EBRD Managing Director
Armenians Commemorating 106th Anniversary of Genocide
Biden Under Pressure to Recognize Armenian Genocide - KTLA 5 News
Governance and Oversight Capacities Account for Our Bank's Robust Management System - Philip Lynch, Independent Board Member at Ameriabank
'Mr. President, It Is Now in Your Power to Right Decades of Denial' - US Congressman Adam Schiff Urges Joe Biden to Recognize Armenian Genocide
Armenians of Nagorno-Karabakh in Despair After Trauma of Military Defeat - France 24
Interview with Kakhaber Kiknavelidze, an Independent Member of Ameriabank Board of Directors
Only Terrorists Keep Hostages, Putting Forward Preconditions for Their Release - Edmon Marukyan
Rep Adam Schiff Says Congress Should Recognize Artsakh
UN's Guterres Issues Global Appeal to Make 2021 'Year of Healing'
NASA's Mars 2020 Perseverance Rover Landing Animations
Azerbaijan Uses Prohibited Phosphorus Chemical Munitions - Defense Army Video
Artsakh Defense Army Units Neutralizing Azerbaijani Arms Supplies
Artsakh Defense Army Units Neutralizing Azerbaijani Drone
Nagorno-Karabakh's Status Has Been At the Heart of Our Approach - Zohrab Mnatsakanyan
Artsakh Defense Army Releases Video Featuring Damaged Azerbaijani Military Equipment
Artsakh Defense Army Units Inflicting Manpower Losses on Azerbaijan
Gas Pipeline Damaged in Azerbaijani Fire Targeting Nagorno-Karabakh's Capital
President Armen Sarkissian Meets Emmanuel Macron at Élysée Palace
Artsakh Defense Army Neutralizes Azerbaijani Military Hardware
Artsakh Defense Army Units Neutralizing Azerbaijani Military Infrastructures
President Armen Sarkissian Meets with NATO Secretary-General in Brussels
Buildings and Homes Lying in Ruins in Nagorno-Karabakh's Capital After Azerbaijani Shelling
Artsakh Defense Army's Precision Fire Gives Deadly Blow to Enemy
Artsakh Defense Army Units Destroying Azerbaijani Tank
Zohrab Mnatsakanyan: Ceasefire Does not Mandate Azerbaijan to Kill Civilians and Hit Civilian Settlements
Armenians Protest Outside Turkrish Embassy in Los Angeles
Losses in Azerbaijan's Military Featured in Defense Army Footage
Artsakh Defense Army Neutralizing Adversary's Transport Column
Turkey openly backs Azerbaijan 'far more aggressively than in the past' - ABC News on Syrian mercenaries fighting in Karabakh
Iconic Armenian Church Hit in Azerbaijani Attacks in Nagorno-Karabakh City (photos)
Artsakh Defense Army Continues High-Precision Strikes
War Situation in Karabakh on European Parliament's Agenda
Call for Urgent Action: Armenian Journalist Brings Intn'l Colleagues' Attention to Situation iin Artsakh After Azerbaijani Attacks
Turkey's Support to Syrian Mercenaries Fighting Against Artsakh: Facts About Azerbaijani Aggression
Nagorno-Karabakh's Capital Under Azerbaijani Strikes
Armenian Armed Forces Neutralize Azerbaijani Defense Positions
ArmenianTroops Destroy Azerbaijani Armored Fighting Vehicle on Frontline
There is a solid evidence that Azerbaijan has launched a thoroughly planned attack on the NKR
EU calls for Immediate End to Hostilities over Nagorno-Karabakh
- 15:20 • 24.05.21 Interview with Francis Malige, EBRD Managing Director
- 11:39 • 24.04.21 Armenians Commemorating 106th Anniversary of Genocide
- 09:40 • 23.04.21 Biden Under Pressure to Recognize Armenian Genocide - KTLA 5 News
- 15:34 • 22.04.21 Governance and Oversight Capacities Account for Our Bank's Robust Management System - Philip Lynch, Independent Board Member at Ameriabank
- 14:09 • 21.04.21 'Mr. President, It Is Now in Your Power to Right Decades of Denial' - US Congressman Adam Schiff Urges Joe Biden to Recognize Armenian Genocide
- 12:37 • 03.04.21 Armenians of Nagorno-Karabakh in Despair After Trauma of Military Defeat - France 24
- 17:33 • 11.03.21 Interview with Kakhaber Kiknavelidze, an Independent Member of Ameriabank Board of Directors
- 17:57 • 26.01.21 Only Terrorists Keep Hostages, Putting Forward Preconditions for Their Release - Edmon Marukyan
- 13:33 • 22.01.21 Rep Adam Schiff Says Congress Should Recognize Artsakh
- 09:42 • 29.12.20 UN's Guterres Issues Global Appeal to Make 2021 'Year of Healing'
- 18:41 • 24.12.20 NASA's Mars 2020 Perseverance Rover Landing Animations
- 13:33 • 31.10.20 Azerbaijan Uses Prohibited Phosphorus Chemical Munitions - Defense Army Video
- 16:37 • 30.10.20 Artsakh Defense Army Units Neutralizing Azerbaijani Arms Supplies
- 11:25 • 28.10.20 Artsakh Defense Army Units Neutralizing Azerbaijani Drone
- 13:45 • 24.10.20 Nagorno-Karabakh's Status Has Been At the Heart of Our Approach - Zohrab Mnatsakanyan
- 11:51 • 24.10.20 Artsakh Defense Army Releases Video Featuring Damaged Azerbaijani Military Equipment
- 11:40 • 24.10.20 Artsakh Defense Army Units Inflicting Manpower Losses on Azerbaijan
- 10:39 • 24.10.20 Gas Pipeline Damaged in Azerbaijani Fire Targeting Nagorno-Karabakh's Capital
- 12:41 • 23.10.20 President Armen Sarkissian Meets Emmanuel Macron at Élysée Palace
- 12:16 • 23.10.20 Artsakh Defense Army Neutralizes Azerbaijani Military Hardware
- 12:02 • 22.10.20 Artsakh Defense Army Units Neutralizing Azerbaijani Military Infrastructures
- 10:35 • 22.10.20 President Armen Sarkissian Meets with NATO Secretary-General in Brussels
- 10:51 • 17.10.20 Buildings and Homes Lying in Ruins in Nagorno-Karabakh's Capital After Azerbaijani Shelling
- 15:09 • 15.10.20 Artsakh Defense Army's Precision Fire Gives Deadly Blow to Enemy
- 13:13 • 13.10.20 Artsakh Defense Army Units Destroying Azerbaijani Tank
- 12:56 • 12.10.20 Zohrab Mnatsakanyan: Ceasefire Does not Mandate Azerbaijan to Kill Civilians and Hit Civilian Settlements
- 12:23 • 12.10.20 Armenians Protest Outside Turkrish Embassy in Los Angeles
- 17:23 • 09.10.20 Losses in Azerbaijan's Military Featured in Defense Army Footage
- 15:53 • 09.10.20 Artsakh Defense Army Neutralizing Adversary's Transport Column
- 14:11 • 09.10.20 Turkey openly backs Azerbaijan 'far more aggressively than in the past' - ABC News on Syrian mercenaries fighting in Karabakh
- 15:52 • 08.10.20 Iconic Armenian Church Hit in Azerbaijani Attacks in Nagorno-Karabakh City (photos)
- 10:57 • 08.10.20 Artsakh Defense Army Continues High-Precision Strikes
- 14:24 • 07.10.20 War Situation in Karabakh on European Parliament's Agenda
- 19:31 • 05.10.20 Call for Urgent Action: Armenian Journalist Brings Intn'l Colleagues' Attention to Situation iin Artsakh After Azerbaijani Attacks
- 16:17 • 04.10.20 Turkey's Support to Syrian Mercenaries Fighting Against Artsakh: Facts About Azerbaijani Aggression
- 12:39 • 04.10.20 Nagorno-Karabakh's Capital Under Azerbaijani Strikes
- 13:49 • 03.10.20 Armenian Armed Forces Neutralize Azerbaijani Defense Positions
- 10:12 • 29.09.20 ArmenianTroops Destroy Azerbaijani Armored Fighting Vehicle on Frontline
- 23:42 • 28.09.20 There is a solid evidence that Azerbaijan has launched a thoroughly planned attack on the NKR
- 18:45 • 28.09.20 EU calls for Immediate End to Hostilities over Nagorno-Karabakh
Most popular articles Today Yesterday For a week
-
Culture 15:28 • 22/04 An exhibition dedicated to Charles Aznavour's centennial anniversary. Yerevan, May 22-July 22 A selection of these artifacts will also be exhibited in Gyumri. Following the exhibition's conclusion, the initiators plan to donate the entire collection to the Charles Aznavour Museum in Yerevan for both permanent and temporary exhibitions.
Economy
-
10:59 • 08.04.24 Ucom continues network modernization in regions of Armenia
-
15:41 • 29.03.24 Director General of Ucom took part in a recruiting conference
Event
-
12:22 • 16.04.24 Ucom continues network modernization in regions of Armenia
-
11:11 • 10.04.24 Ucom has released a new package offer