Edge Rewrite
Jump to content

Template:Addiction-related plasticity

From Wikipedia, the free encyclopedia
Form of neuroplasticity
or behavioral plasticity
Type of reinforcer Ref.
Opiates Psychostimulants High fat or sugar food Sexual intercourse Physical exercise
(aerobic)
Environmental
enrichment
ΔFosB expression in
nucleus accumbens D1-type MSNsTooltip medium spiny neurons
[1]
Behavioral plasticity
Escalation of intake YesYesYes[1]
Psychostimulant
cross-sensitization
YesNot applicableYesYesAttenuatedAttenuated[1]
Psychostimulant
self-administration
[1]
Psychostimulant
conditioned place preference
[1]
Reinstatement of drug-seeking behavior [1]
Neurochemical plasticity
CREBTooltip cAMP response element-binding protein phosphorylation
in the nucleus accumbens
[1]
Sensitized dopamine response
in the nucleus accumbens
NoYesNoYes[1]
Altered striatal dopamine signaling DRD2, ↑DRD3DRD1, ↓DRD2, ↑DRD3DRD1, ↓DRD2, ↑DRD3DRD2DRD2[1]
Altered striatal opioid signaling No change or
μ-opioid receptors
μ-opioid receptors
κ-opioid receptors
μ-opioid receptorsμ-opioid receptorsNo changeNo change[1]
Changes in striatal opioid peptides dynorphin
No change: enkephalin
dynorphinenkephalindynorphindynorphin[1]
Mesocorticolimbic synaptic plasticity
Number of dendrites in the nucleus accumbens [1]
Dendritic spine density in
the nucleus accumbens
[1]