Opioid drugs are responsible for what many consider to be the greatest public health crisis of the 21st century in the United States. In this video, I discuss a few of the ways opioid drugs affect the brain, as well as the basis for opioid tolerance and withdrawal.
The optic nerve, also known as the second cranial nerve, is responsible for transmitting visual information from the retina to the brain. In this video, I discuss the anatomy and function of the optic nerve, as well as describe what can happen when the nerve is damaged.
Note: If you find the deficits in the video below confusing, refer to this written explanation.
The olfactory nerve is also referred to as the first cranial nerve; it's responsible for transmitting information about olfaction, or smell, to the brain. In this video, I discuss the anatomy and function of the olfactory nerve, as well as describe what can happen when the nerve is damaged.