Scammon and Dunn reported equations for estimating brain weight in pediatric patients.
Patient selection: age from newborn to 20 years of age
Parameter:
(1) age in years
|
CNS Tissue
|
Equation for Weight in grams
|
|
entire brain
|
(((age) + 0.315) / ((6.92 * (age)) + 9))*10000
|
|
cerebrum
|
(((age) + 0.39) / ((7.75 * (age)) + 12))* 10000
|
|
cerebellum
|
((age) / ((0.0078 * (age)) + 0.094)) + 19.8
|
|
brainstem
|
((age) / ((0.041 * (age)) + 0.117)) + 5
|
where:
• The brainstem consists of medulla, pons and midbrain.
• The equation for the cerebrum in Snyder et al is 0.775 rather than 7.75. Use of the former results erroneous values.
