The comparison of distribution of delta receptor at different ages of the cerebellum
| Number of synapses | Average length of PSD1-a (M ± SE) | Average number of gold/synapse (range) | Number of gold/μm (M ± SE) | ||
|---|---|---|---|---|---|
| 2 d | CF | 62 | 0.29 ± 0.01 | 0.24 (0–2) | 1.0 ± 0.35 |
| 5 d | CF | 36 | 0.27 ± 0.02 | 0.61 (0–4) | 2.60 ± 0.84 |
| 10 d | PF | 31 | 0.28 ± 0.02 | 5.52 (1–17) | 21.23 ± 3.08 |
| CF | 46 | 0.33 ± 0.02 | 3.35 (0–9) | 11.70 ± 1.57 | |
| 14 d | PF | 40 | 0.29 ± 0.01 | 6.10 (1–12) | 20.13 ± 1.23 |
| CF | 52 | 0.38 ± 0.02 | 5.40 (0–16) | 15.34 ± 1.16 | |
| 21 d | PF | 74 | 0.27 ± 0.01 | 6.76 (0–19) | 25.24 ± 1.20 |
| CF | 31 | 0.27 ± 0.02 | 0.42 (0–2) | 1.84 ± 0.50 | |
| Adult | PF | 109 | 0.32 ± 0.01 | 8.27 (1–19) | 26.06 ± 0.92 |
| CF | 28 | 0.32 ± 0.02 | 0.46 (0–3) | 1.53 ± 0.41 |
↵F1-a PSD, Postsynaptic density measured in micrometers; number of gold/μm, number of gold particles per micrometer; M ± SE, mean ± SE; CF, climbing fiber synapse; and PF, parallel fiber synapse. The increase in number of gold/μm for CFs from P5 to P10 and the subsequent decrease from P14 to P21 were statistically significant (p < 0.01).