Figure 4
taken from each of 20 neurons in individual areas. Expressed as the mean number of spines per 10-µm segment of single dendrites. Tukey–Kramer method. **p < 0.01. (f–i) Spine density of two basal dendrites on every 20- or 50-µm segment. Taken from 20 neurons in the M1 (f), SMA (g), PMd (h), and PMv (i). Error bars denote SEM. *p < 0.05, **p < 0.01.
Spine density of basal dendrites of large layer V pyramidal neurons in frontal motor-related areas. (a–d) Representative morphology of basal dendrite spines of Golgi-impregnated large layer V pyramidal neurons in the M1 (a), SMA (b), PMd (c), and PMv (d). Scale bar, 2 µm. (e) Spine density of basal dendrites in the motor-related areas. Data on two dendrites
