Typical mushroom | Thorny Excrescence | Toric | |
---|---|---|---|
Size | Small | Large | Large |
Neck | Thin | Thin | Wide |
Spine head | Large | Large | Rarely apparent |
Branched? | Rarely | Profusely | Sometimes |
Holes? | No | No | Yes |
Cellular location | Dendrites | Base of apical dendrite | Soma and dendrites |
Synapses per spine | ∼1 | 10+ | 10+ |
Axonal inputs | ∼1 | 1–2 | Up to 11 |
Function | Compartmentalization | Detonation | Integration |
The morphologies, dimensions, patterns of synaptic convergence, and known or hypothesized functions are shown for typical mushroom spines (e.g. Arellano et al., 2007, their Fig. 2) thorny excrescences (e.g. Wilke et al., 2013, their Fig. 5) and toric spines.