Cranial Nerves: BI 232 PDF

   Know the **[name]**, **[number]**, **[location]**, and **[distribution]** of the following nerves. **Name** **Number** **Distribution** ------------------- ------------ -------------------------------------------------------------------------------------------------------------...

   Know the **[name]**, **[number]**, **[location]**, and **[distribution]** of the following nerves. **Name** **Number** **Distribution** ------------------- ------------ ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Olfactory 1 / I Sensory- Olfaction impulses for smell from olfactory epithelium Optic 2 / II Sensory-Vision impulses from retina Oculomotor 3 / III Motor- Somatic motor to inferior, medial, superior rectus, inferior oblique and levator palpebrae superioris muscles. Visceral motor to intrinsic eye muscles (iris and ciliary body) Trochlear 4 / IV Motor- Somatic motor to superior oblique muscle Trigeminal 5 / V Mixed- Somatic motor to muscles of mastication. Somatic sensory from orbital and facial features as well as parts of the mouth (lips, gums, teeth, palate, tongue, pharynx) Abducens 6 / VI Motor- Somatic motor to lateral rectus muscle Facial 7 / VII Mixed- Motor to facial expression, lacrimal gland, submandibular and sublingual salivary glands. Sensory from anterior 2/3 of tongue Vestibulocochlear 8 / VIII Sensory- Hearing and equilibrium impulses from cochlea and vestibule Glossopharyngeal 9 / IX Mixed- Motor to pharyngeal muscles and parotid gland. Sensory from posterior third of tongue, pharynx, palate. Also sensory receptors for blood pressure, pH, oxygen and carbon dioxide concentrations Vagus 10 / X Mixed- Motor to phalangeal and palatal muscles and visceral motor to thoracic and abdominopelvic structures. Sensory from pharynx, auricle, external acoustic meatus, diaphragm, and visceral organs in thoracic and abdominopelvic cavities. Accessory 11 / XI Motor- skeletal muscles of the palate, pharynx, and larynx. Also innervates the sternocleidomastoid and trapezius muscles. Hypoglossal 12 / XII Motor- Somatic motor control of the tongue \*Knowing the **Location** means you can identify the nerve on a picture, dissected brain, or model\*