Saliva
For the mosquito to obtain a blood meal, it must circumvent the vertebrates physiological responses. The mosquito, as with all blood-feeding arthropods, has mechanisms to effectively block the hemostasis system with their saliva, which contains a mixture of secreted proteins. Saglin is a protein produced by the salivary glands of mosquitoes. Mosquito saliva acts to reduce vascular constriction, blood clotting, platelet aggregation, angiogenesis and immunity, and creates inflammation. Universally, hematophagous arthropod saliva contains at least one anti-clotting, one anti-platelet, and one vasodilatory substance. Mosquito saliva also contains enzymes that aid in sugar feeding, and antimicrobial agents to control bacterial growth in the sugar meal. The composition of mosquito saliva is relatively simple, as it usually contains fewer than 20 dominant proteins. As of the early 2000s, scientists still were unable to ascribe functions to more than half of the molecules found in arthropod saliva. One promising application of components of mosquito saliva is the development of anti-clotting drugs, such as clotting inhibitors and capillary dilators, that could be useful for managing cardiovascular disease. It is now well recognized that feeding ticks, sandflies, and, more recently, mosquitoes, have an ability to modulate the immune response of the animals (hosts) on which they feed. The presence of this activity in vector saliva is a reflection of the inherent overlapping and interconnected nature of the host hemostatic and inflammatory/immunological responses and the intrinsic need to prevent these host defenses from disrupting successful feeding.
TGA is very difficult to study because of the patients quick recovery. This form of amnesia, like AA, remains distinct from RA.Post-traumatic amnesia (PTA) is a state of confusion that occurs immediately following a traumatic brain injury in which the injured person is disoriented and unable to remember events that occur after the injury. Psychogenic amnesia, or dissociative amnesia, is a memory disorder characterized by sudden retrograde autobiographical memory loss, said to occur for a period of time ranging from hours to years. See also
Amnesia
Anterograde amnesia
Dissociative amnesia
Scott Bolzan – One of the most severe cases of retrograde amnesia on record

References
External links

Journal of Neuroscience
The strange case of Jonathan Overfeld from The State Were In radio show