hypo/hyperthermia (fever)

what does the anterior hypothalamus control

set point of core body temp, initiation of altering behaviors/homeostatic response (heat losing or conserving mechanisms), receive signals from central and peripheral temperature sensors

where are temperature sensitive neurons located

in brain, core body, viscera and skin

key advantage of temp sensitive neurons

respond to temperature change (peripheral) before core body temperature is effected

which temperature control mechanism is a negative feedback system

temp sensitive neurons

primary heat loss mechanism

evaporation

mechamisms of heat loss

conduction, convection, radiation, evaporation

which of these is not associated with alteration of a set point: hyperthermia or fever

hyperthermia

in which case will animals make more behavioral and physiologic effort to lose heat: hyperthermia or fever

hyperthermia

causes of hyperthermia

increased heat production: exercise, malignant hyperthermia, prolongued seizure activity
absorbtion of environmental heat: heatstroke
nervous system disease

what defines a fever

raise in thermoregulatory set point determined by anterior hypothalamus and secondary to release of pyrogens

what defines a FUO

febrile episode >3weeks with no diagnosis after 1 week of routine diagnostics

workup for an FUO

chart fever, history, PE, BW, body condition, blood culture (just before and during fever)