Sign Up for a Free Account

This is an image preview.
Start a Free Account
to view the full image.

  • Nearly 3,000 illustrations, including video clips of neurologic disorders.

  • Every article is reviewed by our esteemed Editorial Board for accuracy and currency.

  • Full spectrum of neurology in 1,200 comprehensive articles.

  • Listen to MedLink on the go with Audio versions of each article.

The “triadic” MSN synapse

Glutamatergic inputs from the cortex or thalamus synapse directly onto the head of the dendritic spine, dopaminergic projections from the SNr (VTA in ventral striatum) synapse at the neck of the spine, and cholinergic interneurons influence MSNs largely through “volume” transmission with a paucity of well-defined synapses. Ach – acetylcholine, DA – dopamine, Glu – glutamate. (Contributed by Dr. Roger Albin)

Related Media