02 Cranial Nerves - LEARNING OBJECTIVES: CRANIAL NERVES 1....

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
N-21 LEARNING OBJECTIVES: CRANIAL NERVES 1. List the functions of each of the cranial nerves. 2. If a cranial nerve or nucleus is damaged, describe the functional deficit that will occur.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
N-22 Robert W. Blair, Ph.D. CRANIAL NERVES Reading: Widmaier et al., Human Physiology, 12 th ed., Table 6-8, p. 174 I. Olfactory Nerve (Fig. 7-48, p. 222) A. Sense of smell B. Only sensory (afferent) C. Pathway 1. Primary sensory neurons in olfactory epithelium in roof of nasal cavity send olfactory (smell) information to the olfactory bulb. These fibers are the olfactory nerve. Figure1: Olfactory epithelium 2. Olfactory bulb: contains cell bodies of secondary sensory neurons, whose axons comprise the olfactory tract. Note that you rarely see the olfactory “nerve” from the inferior surface of the brain, because it is torn off the olfactory bulb when the brain is removed. 3. Olfactory tract: conveys olfactory information to olfactory cortical areas. II. Optic Nerve (Fig. 7-27, p. 206) A. Sense of sight B. Only sensory (afferent) C. Pathway 1. Photoreceptors in retina of eye transmit visual information to bipolar cells in retina, which are the primary sensory neurons. 2. Bipolar cells synapse on ganglion cells, whose cell bodies also are in retina; ganglion cells are secondary sensory neurons. 3. Axons of ganglion cells leave eyeball Figure 2: Diagram of retina. to form the optic nerve.
Background image of page 2
N-23 4. The terminology is as follows. From the eyeball to the optic chiasm, the fiber bundle is the optic nerve. From the optic chiasm to the lateral geniculate body, the fiber bundle is the optic tract. III. Oculomotor Nerve A. Innervation of eye muscles B. Both motor (efferent) and sensory (afferent); nerve exits from midbrain C. Innervates four of the six eye muscles 1. Superior rectus 2. Medial rectus 3. Inferior rectus 4. Inferior oblique D. Eye movements (Fig. 7-35, p. 212)
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/01/2011 for the course PSYO 5016 taught by Professor Staff during the Fall '11 term at The University of Oklahoma.

Page1 / 7

02 Cranial Nerves - LEARNING OBJECTIVES: CRANIAL NERVES 1....

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online