Because the thalamus is mainly responsible for relaying sensory messages from the body to the brain, it is possible that there is a lot of overlap between the twins’ sensory reception and the actual response it creates within the brain. One study examines this by studying the thalamus when it is at a persistent vegetative state that is when the patient is awake but not conscious. This study proved that the cortical activity on its own is not conscious and that all the activity between the loops of the thalamus, the cerebral cortex and the thalamus itself are all conscious actions. Another study of the thalamus reaffirms that the thalamus does not answer yes/no questions but instead acts as a mediator between different parts of the cerebral cortex and systemic sensory reception.These loops actually may account for the relationship between Tatiana and Krista. At the neuronal level, communication is dense network of neurons linked between themselves and the coordinator (in this case the thalamus) that finally sends a message to the cortex. On top of this, there are links between the cortex that send messages back through the coordinator and finally to the rest of the body. The brains ability to function through loops and circuits is a good model to explain why Tatiana “consciously” feels what Krista is “physically” experiencing. Additionally there is some level of synchronization between the two twins.
Type 3: in this variety axial rotation is intermediate between the first two types with a rotation of being between 40 and 140.Another classification system divides total craniopagus twins into four categories:

Frontal: twins are facing each other with the axis of the bodies forming an acute angle
Temporoparietal: joined immediately above the external auditory meatus
Occipital: twins are connected in the occipital lobe causing the twins to face away from each other
Parietal: twins fuse at the vertex with the axis of the twins forming an obtuse angle; this leads to a situation where the twins share the most veins, lobes, and neural circuitry and thus is often described as one brain shared by two individuals
Having this kind of juncture means that there would be one common continuous cranium housing four cerebral hemispheres. An incomplete dural septum typically separates the flattened cerebral hemispheres. In total vertical craniopagus, the major cerebral arterial supply is usually confined to each respective twin and in some cases conjoined brain tissue may contain a larger artery. Within this category there are three smaller subdivisions that basically outline the different rotational symmetry of the junction. Partial
Stone and Goodrich define partial craniopagus twins as lacking substantial shared dural venous sinuses, with limited surface area involvement, with either intact crania or cranial defects. It is less common than total craniopagus twins. In partial craniopagus twins, the unions are usually frontal and less commonly occipital and vertical. Angular frontal junctions occur when the two twins are joined at any part of the forehead.