Cell | Firingtype | L1 | L2 | L3 | L4 | L5 | L6 | Input from roots | Converging roots | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Aδ | C | Aδ | C | Aδ | C | Aδ | C | Aδ | C | Aδ | C | ||||
Lamina I neuron in L4 | |||||||||||||||
1 | DFN | ○ | — | ○ | — | ○ | — | ○ | * | * | * | * | * | 4Aδ | 4 |
2 | TFN | — | — | ○ | — | ○ | * | ○ | * | * | * | — | * | 3Aδ | 3 |
3 | TFN | — | — | — | — | ○ | — | ○ | — | ○ | * | * | * | 3Aδ | 3 |
4 | TFN | — | — | — | — | — | — | ○ | — | ○ | * | ○ | — | 3Aδ | 3 |
5 | DFN | — | — | ○ | — | — | — | ○ | * | ○ | ● | * | — | 3Aδ + 1C | 3 |
6 | TFN | — | — | ○ | ● | — | — | — | — | ○ | * | ○ | ● | 3Aδ + 2C | 3 |
7 | TFN | — | ● | — | ● | ○ | — | ○ | — | ○ | ● | ○ | * | 4Aδ + 3C | 6 |
8 | TFN | — | * | * | * | * | ● | * | * | ○ | * | — | * | 1Aδ + 1 C | 2 |
9 | TFN | — | — | — | ● | — | ● | ○ | * | ○ | * | — | * | 2Aδ + 2C | 4 |
10 | TFN | — | — | * | * | — | * | ○ | * | * | ● | ○ | ● | 2Aδ + 2C | 3 |
11 | TFN | — | — | — | — | — | ● | — | ● | — | — | 2C | 2 | ||
Lamina I neuron in L3 | |||||||||||||||
12 | TFN | — | — | ○ | — | ○ | * | ○ | * | ○ | — | * | — | 4Aδ | 4 |
13 | DFN | — | — | — | — | ○ | — | ○ | — | ○ | — | — | — | 3Aδ | 3 |
14 | TFN | — | — | — | — | — | — | ○ | * | ○ | * | — | — | 2Aδ | 2 |
15 | — | ● | ○ | — | ○ | — | ○ | — | ○ | — | * | * | 4Aδ + 1C | 5 | |
16 | DFN | — | — | — | — | ○ | * | ○ | ● | ○ | * | ○ | * | 4Aδ + 1C | 4 |
17 | TFN | — | — | ○ | ● | * | * | ○ | * | ○ | * | — | — | 3Aδ + 1C | 3 |
18 | TFN | — | — | — | — | * | ● | ○ | — | — | — | — | — | 1Aδ + 1C | 2 |
19 | TFN | — | ● | * | ● | ○ | * | * | ● | — | * | 1Aδ + 3C | 4 | ||
20 | TFN | — | — | — | ● | — | ● | — | ● | — | ● | — | — | 4C | 4 |
↵This table describes only those lamina I neurons for which the monosynaptic inputs from at least two segmental dorsal roots could be confirmed. Monosynaptic Aδ- and C-fiber inputs are indicated by open and filled circles, respectively. Asterisks (*) indicate inputs from segmental roots that could not be analyzed due to large number of overlapping EPSCs.
↵— indicates inputs from roots that were analyzed, but the monosynaptic EPSCs were not revealed. In cells 11 and 19, the L2 roots were damaged. In the last but one column, the input from the roots is given as n1Aδ + n2C, where n1 and n2 are the numbers of different segmental dorsal roots with monosynaptic Aδ- and C-fiber projections, respectively. In the last column, the number of converging roots is the number of segmental dorsal roots with monosynaptic Aδ-/C-inputs. TFN, Tonic-firing neuron; DFN, delayed-firing neuron. The firing pattern in cell 15 could not be identified.