Natural size. The model is divided into 15 parts: the transparent left cerebral cortex is connected to the sagittal sinus and part of the skull; the spinal cord and vertebral arteries in the cervical spine; the right side of the transparent cerebral cortex; the right half of the sphenoid bone, Movable brain stem (divided into left and right halves), left and right islet islet cortex, left striatum, right intima, corpus callosum, fornix, limbic system and ventricular system, as well as the left and right halves of the cerebellum. Fixed on a shelf with a base.