[Solved] Sympathetic fibers leave the spinal cord in the ________. A) cranial and sacral regions B) lumbar and sacral regions C) cranial and thoracic regions D) thoracic and lumbar regions E) cervical and sacral regions Erotic Plasticity: The degree to which an individual's sex drive or sexual interests can be shaped and altered by cultural, social, and situational factors. Hypothalamus: A small region of the brain that plays a crucial role in many essential functions, including hormone regulation, temperature, and appetite control. Cerebellum: A part of the brain located at the back of the skull that is responsible for coordinating movement and balance. Amygdala: A section of the brain that is responsible for detecting fear and preparing for emergency events.