Table 1.

Statistical analysis of paired recording data: connection probabilities

Postsynaptic	Presynaptic
Postsynaptic	Corticospinal	Corticostriatal
Corticospinal	Pathway: SPI → SPI	Pathway: STR → SPI
	n_connected: 14	n_connected: 24
	n_tested: 355	n_tested: 115
	p_con: 0.04	p_con: 0.21
Corticostriatal	Pathway: SPI → STR	Pathway: STR → STR
	n_connected: 0	n_connected: 16
	n_tested: 109	n_tested: 144
	p_con: 0	p_con: 0.11

Connection probabilities (p_con) were calculated as the number of connections detected (n_connected) divided by the total number of connections tested (n_tested). SPI, corticospinal; STR, corticostriatal.