Cerebral ventricular size in developing normal kittens measured by ultrasonography

Area of Science:

• Veterinary Neurology
• Comparative Anatomy
• Diagnostic Imaging

Background:

• Understanding feline neurodevelopment is crucial for diagnosing neurological conditions.
• The bregmatic fontanelle serves as a key anatomical landmark for neonatal brain imaging in kittens.
• Limited data exists on the normal age of fontanelle closure and lateral ventricle dimensions in developing kittens.

Purpose of the Study:

• To determine the typical age range for bregmatic fontanelle closure in healthy kittens.
• To measure the size of lateral ventricles in normal kittens throughout their early development.
• To establish normative ultrasonographic data for feline pediatric neuroimaging.

Main Methods:

• Fifty ultrasonographic examinations were performed on normal kittens using the bregmatic fontanelle as an acoustic window.
• A longitudinal study tracked skull depth and lateral ventricle depth in five kittens up to approximately 5 months of age.
• Two neonatal kittens underwent necropsy, with one receiving sonographically guided ink injection into a lateral ventricle for anatomical verification.

Main Results:

• Skull depth increased from a median of 1.95 cm at 7 days to 2.58 cm at 154 days.
• Lateral ventricle depth increased from 0.3 mm to 1.1 mm during the same developmental period.
• These measurements indicate significant growth and changes in feline brain structures during the first 5 months of life.

Conclusions:

• The bregmatic fontanelle in kittens typically closes around 5 months of age.
• Lateral ventricle dimensions show a notable increase in size during kitten development up to 5 months.
• This study provides essential normative ultrasonographic data for assessing feline pediatric neurological health.