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Dorsal root reflexes in kittens.

P Bawa1

  • 1School of Kinesiology, Simon Fraser University, Burnaby, B.C., Canada.

Brain Research
|March 1, 1988
PubMed
Summary

Dorsal root reflex (DRR) activity in kittens emerges after birth and matures with age. DRR magnitude increases significantly during the first month, then declines to adult levels.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Physiology

Background:

  • Dorsal root reflexes (DRR) are neural responses originating from peripheral nerve stimulation.
  • Understanding the developmental trajectory of DRR is crucial for assessing nervous system maturation.

Purpose of the Study:

  • To investigate the ontogeny of dorsal root reflexes in developing kittens.
  • To characterize the age-related changes in DRR magnitude and timing.

Main Methods:

  • Peripheral nerves of kittens (0.5 to 66 days old) and adult cats were stimulated.
  • Dorsal root reflex activity was recorded from dorsal roots.
  • Analysis focused on DRR amplitude and duration in relation to age.

Main Results:

  • No dorsal root reflex activity was observed in newborn kittens.
  • DRR activity emerged around the 4th-5th postnatal day.
  • The magnitude of DRR increased progressively with age, peaking at 4 weeks.
  • A decline in DRR activity towards adult values was noted during the 5th week.

Conclusions:

  • Dorsal root reflex development in kittens follows a distinct pattern, appearing postnatally and maturing over the first month.
  • The observed developmental changes in DRR reflect the maturation of spinal cord neural circuits.
  • This study provides normative data for DRR development in a feline model.

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