Textbook Question
Mr. Spencer suffers loss of taste sensation. Tests reveal that his taste buds and salivary glands are functional. What other structures might be impaired that would explain his loss of taste?
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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 L3.5
Mrs. Flores is a 45-year-old female who suffered a fracture of the ethmoid bone as the result of a car accident. Several days later, she complained that she couldn't taste her food very well. How is her injury related to the loss of taste sensation?
Verified step by step guidance1
Understand the anatomy of the ethmoid bone: The ethmoid bone is located in the skull and forms part of the nasal cavity and the medial wall of the orbit. It contains the cribriform plate, which is perforated by small holes that allow the olfactory nerve fibers (cranial nerve I) to pass from the nasal cavity to the brain.
Recognize the connection between smell and taste: Taste sensation is closely linked to the sense of smell. The olfactory nerve transmits signals related to odors, which significantly contribute to the perception of flavor. If the sense of smell is impaired, the ability to perceive flavors is diminished.
Analyze the impact of the ethmoid bone fracture: A fracture of the ethmoid bone, particularly the cribriform plate, can damage or sever the olfactory nerve fibers. This injury can lead to anosmia (loss of the sense of smell), which indirectly affects the ability to taste food.
Consider the timeline of symptoms: Mrs. Flores reported difficulty tasting food several days after the accident. This delay suggests that the loss of smell due to nerve damage may have gradually impacted her ability to perceive flavors.
Conclude the relationship: The injury to the ethmoid bone likely caused damage to the olfactory nerve fibers, leading to a loss of smell. Since smell is integral to the perception of taste, this explains Mrs. Flores' complaint of diminished taste sensation.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Ethmoid Bone Anatomy
The ethmoid bone is a delicate structure located between the nasal cavity and the brain. It plays a crucial role in supporting the nasal cavity and contains the olfactory foramina, which allow the passage of olfactory nerves responsible for the sense of smell. Damage to this bone can disrupt the olfactory pathways, potentially affecting taste perception since smell significantly contributes to flavor.
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Olfactory Nerve Function
The olfactory nerve (cranial nerve I) is responsible for transmitting sensory information related to smell from the nasal cavity to the brain. When the ethmoid bone is fractured, it can lead to olfactory nerve damage or disruption, resulting in a diminished ability to perceive odors. Since taste and smell are closely linked, any impairment in olfactory function can lead to a reduced ability to taste food.
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Taste and Smell Connection
Taste and smell are two of the five senses that work together to create the perception of flavor. While taste is primarily detected by taste buds on the tongue, the olfactory system contributes significantly to the overall experience of flavor. When the sense of smell is compromised, as may occur after an ethmoid bone fracture, the ability to enjoy and identify different tastes can be severely affected.
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Related Practice
Textbook Question
If a patient suffers visual impairment only in one eye, why must the damage be located in the visual pathway prior to the optic chiasma?
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Textbook Question
If severe congestion from a cold prevented your pharyngotympanic tube from opening, what could happen to your tympanic membrane? Explain your answer.
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Textbook Question
Your 60-year-old patient, Mr. Guster, has Bell's palsy, which causes dysfunction of those portions of the facial nerve that control muscles of facial expression. He is surprised when you tell him to tape the eyelids of his right eye closed at night to prevent dryness. Why might Bell's palsy cause dryness of the eye on the affected side?
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Textbook Question
In an olfactory neuron, the binding of a(n) ______ to its membrane receptor triggers a(n) _______ potential in the axons of the ______ nerve.
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Textbook Question
Your friend tells you that she has just been diagnosed with myopia, and she wonders if staring at her computer screen too much might have caused her problem. What do you tell her?
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