we have investigated if the c3-c4 pns which project monosynaptically to forelimb motoneurones are specifically active during target-reaching by using the technique of transneuronal uptake of wheat germ agglutinin-conjugated horseradish peroxidase ( wga-hrp ) into last order neurones which appears to be activity-dependent .
C0019941
horseradish peroxidase
C0078473
wga-hrp