457
Extracellular single - neurone recordings were made in the rat ventrobasal thalamus ( VB ) in conjunction with iontophoresis of agonists , an antagonist and a positive allosteric modulator and / or intravenous ( i . v . ) injection of XA .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None