| TABLE 9
Radial breadth of Ihe membrana basilaris measured between the foramina nervina
and ligamentum spirale in radial sections on age (chart 7, fig. 2}
AGE
BODY WEIGHT
INNER ZONE
(Zona
arcuata)
OUTER ZONE
(Zona
pectinata)
Total radial
breadth of
the membrane
Ratios between
the radial breadth
of the inner and
outer zone
days
grams
P
M
M
M
1
5
49
75
124
1 1.5
3
8
63
91
154
1.5
6
11
77
105
182
1.4
9 1
10
79
111
190
1.4
12
13
- 88
100
188
1.1
15
13
87
102
189
1.2
20
29
86
106
192
1.2
. 25
36
87
108
195
1.2
50
59
88
107
195
1.2
100
112
92
106
Id8
1.2
150
183
92
107
199
1.2
257
137
92
107
199
1.2
366
181
93
111
204
1.2
546
255
94
113
207
1.2
Ratios 1 546 days
1 1.9
1 1.5
1 1.7
12546 "
1.1
1.1
1.1
20546 "
1.1
1.1
1.1
1 A rat of nine days which could hear, gave the following:
Right side 11
94
103
197
91
104
195
93
104
196
1 : 1.1
| 