Health Sciences 3300A/B Lecture Notes - Lecture 4: Temporal Lobe, Trigeminal Neuralgia, Idiopathy
23 Jan 2019
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Protrudes into the nasal cavity, suspended in the mucosal layer. Samples things that you breathe in, and dissolves into the mucosal layer. Specific chemicals cause the nerve to depolarize. All the information will collect at the bulb ending up in the olfactory cortex. **the nerve dangles from the olfactory bulb. Only sensory information we receive that doesn"t go through the thalamus. Thalamus filter/modulates the amount of information that comes in. So when you smell something bad, you can not smell it. Also very tied to memory systems, very resilient. Information travels from the optic nerve optic chiasm (cross over of visual information ) . Need three separate nerves so our eye movements can be precise and finely tuned. Trochlear and abducens- specific to one muscle in the eye. Abducens---inferior: pull down, superior: pull up, medial: pull medially, lateral: pull latterly. Know trochlear and abducens and oculomotor does the rest. 3 big branches- face innervation at 3 different levels.
