The innervation of the eye muscles can be remembered by using the "chemical formula" below. According to this, all the extrinsic eye muscles except the superior oblique and lateral rectus are innervated by cranial nerve [(SO4)(LR6)]3.
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The chemical formula for the innervation of the eye muscles is [SO4](LR6). Show more…
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10. Which cranial nerve carries motor commands to the chewing muscles? a. facial nerve b. hypoglossal nerve c. trigeminal nerve d. glossopharyngeal nerve 11. The primary motor area of the brain: a. Is located in the cerebellum b. Receives most sensory impulses c. Initiates motor impulses d. Is the main integration center 12. Cranial nerve V: a. Is called the trigeminal nerve b. Is a mixed nerve c. Consists of three branches d. All of the above 13. Testing motor functions by smiling, raising the eyebrows, and closing the eyes, and testing sensations by placing a piece of sugar on the tip of the tongue, are examinations for the function of cranial nerve: a. VII b. X c. III d. XI 14. In order to observe convolutions in the sheep brain, you must first remove the: a. Cerebral cortex b. Pia mater c. Dura mater d. Cranial nerves 15. The corpora quadrigemina is: a. Composed of the superior colliculi b. Part of the midbrain c. Composed of the inferior colliculi d. All of the above 16. Reading an eye chart can be used as a test for cranial nerve: a. I b. V c. II d. IV 17. In the sheep brain, the dorsal surface is occupied mainly by the: a. Cerebellum b. Cerebrum c. Lateral ventricle d. Brain stem 18. What part of the brain includes an attachment to the pituitary gland? a. Cerebral cortex b. Epithalamus c. Hypothalamus d. Corpus callosum 19. In life, the lateral ventricles contain: a. The pia mater b. The hypothalamus c. Cerebrospinal fluid d. The dura mater
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8. Using key choices, identify the parts of the eye described in the following statements. Insert the correct term or letter response in the answer blanks. KEY CHOICES: A. Aqueous humor B. Canal of Schlemm C. Choroid coat D. Ciliary body E. Cornea F. Fovea centralis G. Iris H. Lens I. Optic disk J. Retina K. Sclera L. Suspensory ligaments M. Vitreous humor 1. Attaches the lens to the ciliary body 2. Fluid that fills the anterior chamber of the eye; provides nutrients to the lens and cornea 3. The "white" of the eye 4. Area of retina that lacks photoreceptors; the blind spot 5. Contains muscle that controls the shape of the lens 6. Nutritive (vascular) tunic of the eye 7. Drains the aqueous humor of the eye 8. Tunic, containing the rods and cones 9. Gel-like substance filling the posterior cavity of the eyeball; helps to reinforce the eyeball 10. Heavily pigmented tunic that prevents light scattering within the eye 11. ___ 12. Smooth muscle structures (intrinsic eye muscles) 13. Area of acute or discriminatory vision 14. ___ 15. ___ 16. ___ 17. Refractory media of the eye 18. Anteriormost part of the sclera—your "window on the world" 19. Tunic composed of tough, white fibrous connective tissue 9. Using the key choice terms given in Exercise 8, identify the structures indicated by leader lines on the diagram of the eye in Figure 8-2. Select different colors for all structures provided with a color-coding circle in Exercise 8, and then use them to color the coding circles and corresponding structures in the figure.
This cranial nerve contains axons carrying general sensory information coming from the face and other areas of the head. It also contains axons going from the brain to innervate. A) Trigeminal B) Olfactory C) Vagus D) Abducens 2. This nerve carries sensory information containing both auditory (hearing) and equilibrium (balance) information. A) Vestibulocochlear B) Abducens C) Olfactory D) Hypoglossal 3. When you move your tongue during activities like speech and eating, this cranial nerve is activating the intrinsic and extrinsic muscles of the tongue. No sensory information is carried by this nerve, only motor. A) Hypoglossal B) Facial C) Optic D) Vagus 4. The superior oblique eye muscle is activated by this cranial nerve. A) Hypoglossal B) Vagus C) Optic D) Trochlear 5. When you smell a flower, nerve impulses created by the odor molecules are sent to the brain through this nerve. A) Optic B) Oculomotor C) Olfactory D) Facial 6. When you see a flower, visual information is sent from the eyes to the brain through this nerve. A) Abducens B) Accessory C) Optic D) Oculomotor 7. This cranial nerve innervates and activates the lateral rectus eye muscle. A) Trochlear B) Optic C) Oculomotor D) Abducens 8. Which of the following cranial nerves is active during the movement of the eye? A) Oculomotor B) Trigeminal C) Accessory D) Glossopharyngeal 9. When you smile and frown, you are activating muscles of the face via this cranial nerve. It also carries some taste sensory information from the anterior tongue. A) Accessory B) Vagus C) Facial D) Trigeminal 10. Motor nerve impulses to contract portions of the trapezius muscle are carried in this cranial nerve. A) Accessory B) Trochlear C) Glossopharyngeal D) Oculomotor 11. Taste sensations from the posterior portion of the tongue travel along this nerve to the brain. A) Oculomotor B) Glossopharyngeal C) Abducens D) Olfactory
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