Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
The auditory canal is separated from the middle ear by the round window.
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Ch. 15 The Special Senses
Amerman3rd EditionHuman Anatomy & PhysiologyISBN: 9780138247201, 9780138247928, 9780138201814
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Table of contents
- Ch. 1 Introduction to Anatomy and Physiology24
- Ch. 2 The Chemistry of Life37
- Ch. 3 The Cell54
- Ch. 4 Histology46
- Ch. 5 The Integumentary System30
- Ch. 6 Bones and Bone Tissue36
- Ch. 7 The Skeletal System40
- Ch. 8 Articulations19
- Ch. 9 The Muscular System35
- Ch. 10 Muscle Tissue and Physiology29
- Ch. 11 Introduction to the Nervous System and Nervous Tissue28
- Ch. 12 The Central Nervous System41
- Ch. 13 The Peripheral Nervous System41
- Ch. 14 The Autonomic Nervous System and Homeostasis31
- Ch. 15 The Special Senses39
- Ch. 16 The Endocrine System42
- Ch. 17 The Cardiovascular System I: The Heart28
- Ch. 18 The Cardiovascular System II: The Blood Vessels43
- Ch. 19 Blood32
- Ch. 20 The Lymphatic System and Immunity41
- Ch. 21 The Respiratory System27
- Ch. 22 The Digestive System27
- Ch. 23 Metabolism and Nutrition7
- Ch. 24 The Urinary System39
- Ch. 25 Fluid, Electrolyte, and Acid-Base Homeostasis39
- Ch. 26 The Reproductive System10
- Ch. 27 Development and Heredity5
Amerman3rd EditionHuman Anatomy & PhysiologyISBN: 9780138247201, 9780138247928, 9780138201814Not the one you use?Change textbook
Chapter 15, Problem 12
The axons from the nasal retina in the left eye terminate in the:
a. Right lateral geniculate nucleus
b. Left lateral geniculate nucleus
c. Right medial occipital lobe
d. Left medial occipital lobe
Verified step by step guidance1
Understand the anatomy of the visual pathway: The retina is divided into two halves, the nasal retina (closer to the nose) and the temporal retina (closer to the temples). Axons from the nasal retina cross over to the opposite side of the brain at the optic chiasm.
Recall the role of the lateral geniculate nucleus (LGN): The LGN is a relay center in the thalamus that processes visual information. Axons from the nasal retina terminate in the LGN on the opposite side of the brain.
Determine the pathway for the left eye's nasal retina: Axons from the nasal retina of the left eye cross over at the optic chiasm and terminate in the right lateral geniculate nucleus.
Eliminate incorrect options: The left lateral geniculate nucleus processes information from the temporal retina of the left eye, not the nasal retina. The medial occipital lobe is involved in higher visual processing but does not directly receive axons from the retina.
Conclude the correct answer: Based on the anatomy of the visual pathway, axons from the nasal retina of the left eye terminate in the right lateral geniculate nucleus.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Visual Pathway
The visual pathway refers to the route that visual information takes from the retina to the brain. In humans, the axons from the nasal retina cross at the optic chiasm, which is crucial for the processing of visual information from both eyes. Understanding this pathway is essential for determining where visual signals are processed in the brain.
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Alternative Pathway
Lateral Geniculate Nucleus (LGN)
The lateral geniculate nucleus is a critical relay center in the thalamus for visual information received from the retina. It has distinct layers that process different types of visual information, such as color and motion. The LGN is divided into left and right nuclei, corresponding to the visual input from each eye, making it vital for understanding visual processing.
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Hemifield Representation
Hemifield representation refers to how visual information from each eye is processed in the brain. The nasal retina of one eye captures information from the opposite visual field, meaning that the left nasal retina processes information from the right visual field. This concept is key to understanding why the axons from the left nasal retina terminate in the right lateral geniculate nucleus.
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