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| TABLE I:
Number of 5HT and TH Varicosities on Neuron Cell Bodies
and in Neuropil of Rat mPFCx | ||||
|---|---|---|---|---|
| Cortical Layer | Number (%) Varicosities Cell Bodies | Number (%) Varicosities Neuropil | Total Number Varicosities | |
| 5HT | Layer II Layer VI | 189 (35%) 92 (18%) | 344 (65%) 429 (82%) | 533 521 |
| TH | Layer II Layer VI | 131 (23%) 177 (13%) | 429 (77%) 1177 (87%) | 560 1354 |
TABLE II:
Total Areal Percentage of Neurons in Sample Fields of Rat mPFCx| Cortical | Layer Cell Area | in µm2 Field Area | in µm2 % Cell Somata
| % Neuropil | 5HT
| Layer II | Layer VI 30365.15 | 24483.78 292350.6 | 292350.6 10% | 8% 90% | 92% TH
| Layer II | Layer VI 28677.26 | 23381.47 292350.6 | 292350.6 10% | 8% 90% | 92% | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
TABLE III:
 analysis of the randomness of 5HT and TH varicosity
interactions with cell bodies and in neuropil5HT | TH | Cortical | Layer Neuropil | Cell Body | Neuropil | Cell Body | Layer II | Observed | Predicted 344 (65%) | 477 (89%) 189 (35%) | 56 (11%) 429 (77%) | 505 (90%) 131 (23%) | 55 (10%) Layer VI | Observed | Predicted 429 (82%) | 477 (92%) 92 (18%) | 44 (8%) 1177 (87%) | 1245 (92%) 177 (13%) | 108 (8%) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
5HT
= 93.7 p = 0.0001) = 19.5 p = 0.0001)
= 37.2 p = 0.0001) = 18.7 p = 0.0001)
TABLE IV:
Relative size distribution of Nissl-stained neurons with and
without 5HT varicosities in layers II and VI of rat mPFCx|
| Cortical | Layer Large | Neurons (  100 µm2)
Small | Neurons (<100 µm2) Total Cells | II
| Neurons | with Varicosities 116 (54%)
| 23 (53%)
| 139 (54%) | Neurons | with no Varicosities 100 (46%)
| 20 (47%)
| 120 (46%) | Total | Neurons 216 (83%)
| 43 (17%)
| 259 | VI | Neurons | with Varicosities 65 (38%)
| 19 (44%)
| 84 (39%) | Neurons | with no Varicosities 108 (62%)
| 24 (56%)
| 132 (61%) | Total | Neurons 173 (80%)
| 43 (20%)
| 216 | | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
TABLE V:
Relative size distribution of Nissl-stained neurons with and without TH varicosities
in layers II and VI of rat mPFCx| Cortical | Layer Large | Neurons ( 100 µm2)
Small | Neurons (<100 µm2) Total Cells | II
| Neurons with | Varicosities 91 (43%) | 21 (68%) | 112 (46%) | Neurons with | no Varicosities 123 (57%) | 10 (32%) | 133 (54%) | Total Neurons | 214 (87%) | 31 (13%) | 245 | VI | Neurons with | Varicosities 102 (67%) | 37 (58%) | 139 (64%) | Neurons with | no Varicosities 50 (33%) | 27 (42%) | 77 (36%) | Total Neurons | 152 (70%) | 64 (30%) | 216 | | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
TABLE VI:
Percent of large (100µm2) and small
(<100µm2) neurons with varicosities plus probability of convergence|
| Cortical | Layer 5HT | TH | Probability of | Convergence Large Neurons | with varicosities ( 100 µm2)
Layer II | 54% | 43% | 23% | Layer VI | 38% | 67% | 25% | Small Neurons | with varicosites (<100 µm2) Layer II | 53% | 68% | 36% | Layer VI | 44% | 58% | 26% | | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
The percentage of 5HT-IR and TH-IR cells in apposition with large and small cell somata in layers II and VI were multiplied by one another to generate a predicted probability of convergence.