GROWTH OF THE FETAL CENTRAL NERVOUS SYSTEM 
TABLE 42. 
465 
Catcutatep ABSoLuTE AND PERCENTAGE INCREMENTS oF THE Srverat Parts or THE Brain 
AND OF THE SPINAL Corp IN Each MontH or THe fetat Periop 
CreREBRUM 
CEREBELLUM 
Pons aND Meputta| Mipprain} Spina Corp 
Cerebellum 
Volume 
Both | [ronto la “ij 
Hemispheres occipilal ses 
Vine | Lebgin | Demeter 
Vermis 
Cerebelli 
| Reight 
Vermis 
Cerebelli 
Length 
Spinal 
ord 
Length 
Pons and 
Medulla 
Volume 
Mid brain 
Volume 
Pons 
Lenglh 
a4 
| % 
1.56 
20 
C26) 141) 247 2.31 
ie 
3.03 
TABLE 4) 
EpintcAt Formutac Representinc Curves or Linetar AND VoLuMeTRIC GROWTH 
or THe Central Nervous System nw otHe Terat Pentop 
Seeciric FoRMuLAE 
Messonevent (ExPonenTiaL) 
Fronfo-occipital Lenglh Y= O.1T5X+025 
Temporal-lemporal Diameter = Y: 0.138X+ 03 
Pons Lenglh Y= 0.0£263X+ 0.16 
Colliculi Length Y: 0.015X+04T 
inal Cord Length Y: (10.0x) 4674.0 
Ban Cord tat Y: (10.0X)?!4-4.0 
Tronlo- spinal Length Y- (2.0K)47-2.2 
Vermis Cerebelli Length Y= 0.01(X!4!+15.0) 
Vermis Cerebelli Height ¥: 0.01(K!>") 
Spinal Cord Volume Y= 0.01[(017X)2 7% 11.0] 
Pons and Medulla Volume Y= 0.0{|(0.2X)* £7 +200 
Y= 0.01{(0.168x)* +120] 
Mid Brain Volume 
Cerebellum Volume Y+ 0.01[(0.095X)*%+200] 
Bight Hemisphere Velume ¥: (0.1X)29 
t Hemisphere Volume Y= (0.105x)? 
Both Hemispheres Volume Y: (0.12X)>'9 
Bneephalon Volume Y: (O.125X)" ler 15 
Y= (0.13X)7'9+1.0 
Y= (O,)14X)°7442.0 
Encephalon Weight 
Central Rages Sysen Volume 
Type or JORMULA 
Y-aX+b 
Y=0.01(X%+b) 
Y- 0.01[(ax)+ ¢] 
Y= (ax)> 
Y- (oX)P+ c 
Seeciric FORMULAE 
(LoeaRritHMic) 
Y= O.1T5X+025 
Y= 0.138X +03 
Y= 0.0263K+0.16 
Y: 0.015X+ O47 
Y=O.0TX+ 10 /ogX-65 
Y= O.1TX +11 /ogX-GT 
Y-O0.051K+4/0gX-2.85 
Y- 0.01(0.073X+Z.85)> 
Y=0.01(.07X+245)> 
Y= 1.4(0.02X+031)-O0I3X+0.1 
Y=094 (O03K+02)"+ Ol 
Type oF FORMULA 
Y=aX+b 
Y= aX+b ogkK-c 
Y=0.01(aX+b)? 
Y=a(bX+c)°+dX+e 
Y=1.5(0.02X+0:3!)+-O0Z7X+038 
Y=0.01(0.020X+1.03)? Y= 0.01 (aX+b)? 
Y= (01085X-0.09)* : 
Y= (O.108X-0.05)° Yea(bX-c)” 
Y=1.1(0.137X-0.07)=0.4X+5.0 
se (0.14X+0.2)-X+10.0 
| 
Y=a(bXtc)-dX+e 
Y=1.17(O.137X-0.03)*-1.12K+16.0 
