Electroacupuncture Treatment Alleviates the Remifentanil-Induced Hyperalgesia by Regulating the Activities of the Ventral Posterior Lateral Nucleus of the Thalamus Neurons in Rats

Figure 2

Histological verification of the recording electrodes sites in the right ventral posterior lateral nucleus (VPL) of the thalamus region. (a) Photomicrograph of a histological section stained with neutral red to illustrate the position of the recording electrode sites made by an electrolytic lesion through the respective electrodes (as arrow shows). (b) Representations of three coronal sections through the rat VPL are shown in sequence from anterior to posterior, respectively. The numbers in the right margin indicate millimeters posterior to the bregma. The filled circles in the right hemisphere show the approximate positions of the recording electrodes corresponding to some representative rats in the different groups.

(a)

(b)