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Uner Tan Syndrome

Predisposing Factors

Signs & Symptoms

  • UTS is associated with intrafamilal marriages which suggest an autosomal recessive transmission
  • There are no environment factors that forced the affected individuals to walk on all fours although some auhtors suggested the environment has a strong determining effect on quadrupedality
  • May be related to the theory of human backward evolution or de-evolution which is the notion that species revert into more "primitive" forms over time.

Biological Changes

  • Abnormalities to chromosomes 9p24
  • A deformity of VLDLR is found on chromosome 9p24

What is UTS?

Habitual Quadrupedalism

  • UTS is characterized by cerebellar hypoplasia
  • loss of balance and coordination
  • impaired cognitive abilities and habitual quadrupedal gait on hands and feet
  • Is the the primary characteristic of Uner Tan Syndrome
  • There are two types of quadrupedal locomotion:
  • Diagonal sequence
  • Lateral sequence

Types of UTS

  • In diagonal sequence the foot touches the ground followed by the contralateral hand
  • In lateral sequence the foot touches the ground followed by the ipsilateral hand.
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