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Article: Structural and functional characterization of dendritic arbors and GABAergic synaptic inputs on interneurons and principal cells in the rat basolateral amygdala.

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Klenowski PM; Fogarty MJ; Belmer A; Noakes PG; Bellingham MC; Bartlett SE
J. Neurophysiol., 2015


Table 2.

Branch order characteristics for different tree types of BLA cells

Branch Order PropertiesPrincipal ApicalPrincipal BasalSpiny InterneuronAspiny InterneuronP Values
1st-order branch segments1.0 ± 0.05.4 ± 0.46.0 ± 0.36.0 ± 0.4PA vs. PB: ****P < 0.0001
PA vs. S: ****P < 0.0001
PA vs. A: ***P < 0.0009
1st-order mean branch segment length, μm15.7 ± 3.427.6 ± 3.031.4 ± 6.233.8 ± 7.6Not significant
1st-order branch mean total spines7.3 ± 2.050.8 ± 7.857.3 ± 12.810.3 ± 2.2Not significant
2nd-order branch segments2.1 ± 0.17.1 ± 0.66.5 ± 0.64.0 ± 0.8PA vs. PB: ****P < 0.0001
PA vs. S: ****P < 0.0001
2nd-order mean branch segment length, μm33.3 ± 5.935.7 ± 2.239.0 ± 6.137.5 ± 7.6Not significant
2nd-order branch mean total spines30.8 ± 6.486.6 ± 11.493.0 ± 29.014.5 ± 4.6Not significant
3rd-order branch segments3.2 ± 0.36.7 ± 0.64.2 ± 0.61.5 ± 0.5PA vs. PB: ****P = 0.0002
PB vs. S: *P = 0.0346
PB vs. A: ***P = 0.0003
3rd-order mean branch segment length, μm47.3 ± 5.140.0 ± 3.344.9 ± 4.320.6 ± 8.9Not significant
3rd-order branch mean total spines76.1 ± 11.5137.5 ± 24.888.8 ± 25.23.3 ± 1.7PB vs. A: **P = 0.0076
4th-order branch segments3.0 ± 0.34.7 ± 0.62.1 ± 0.41.5 ± 0.5PB vs. S: *P = 0.0153
4th-order mean branch segment length, μm57.4 ± 7.740.6 ± 5.027.1 ± 5.544.1 ± 19.5PA vs. S: **P = 0.0045
4th-order branch mean total spines96.5 ± 17.5103.6 ± 18.331.0 ± 6.45.2 ± 3.2Not significant
5th-order and above branch segments7.4 ± 1.44.0 ± 1.01.1 ± 0.40.5 ± 0.5PA vs. PB: ***P = 0.0004
PB vs. S: **P = 0.0064
PB vs. A: *P = 0.0349
PA vs. S: ****P < 0.0001
PA vs. A: ****P < 0.0001
5th-order and above mean branch segment length, μm87.8 ± 13.930.5 ± 5.215.6 ± 5.21.4 ± 1.4PA vs. PB: ****P < 0.0001
PA vs. S: ****P < 0.0001
PA vs. A: ****P < 0.0001
5th-order branch mean total spines222.2 ± 35.0105.8 ± 41.114.8 ± 5.80.29 ± 0.29PA vs. PB: ***P = 0.0001
PB vs. S: *P = 0.0106
PA vs. S: ****P < 0.0001
PA vs. A: ****P < 0.0001

  • All data presented as means ± SE for principal neurons (n = 29), spiny interneurons (n = 23), and aspiny interneurons (n = 8). BLA, basolateral amygdala.

  • ↵* P < 0.05,

  • ↵** P < 0.01,

  • ↵*** P < 0.001,

  • ↵**** P < 0.0001, 2-way ANOVAs with Bonferroni's posttest.


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