Textbook Question
List the names of the 12 pairs of cranial nerves. (Hint: use the mnemonic device 'Oh, Once One Takes The Anatomy Final, Very Good Vacations Are Heavenly.' )
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Ch. 14 The Brain and Cranial Nerves
Martini, Nath, Bartholomew12th EditionFundamentals of Anatomy and PhysiologyISBN: 9780137854011
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Table of contents
- Ch. 1 An Introduction to Anatomy and Physiology25
- Ch. 2 The Chemical Level of Organization34
- Ch. 3 The Cellular Level of Organization29
- Ch. 4 The Tissue Level of Organization24
- Ch. 5 The Integumentary System17
- Ch. 6 Bones and Bone Structure33
- Ch. 7 The Axial Skeleton11
- Ch. 8 The Appendicular Skeleton17
- Ch. 9 Joints13
- Ch. 10 Muscle Tissue12
- Ch. 11 The Muscular System28
- Ch. 12 Nervous Tissue18
- Ch. 13 The Spinal Cord, Spinal Nerves, and Spinal Reflexes22
- Ch. 14 The Brain and Cranial Nerves20
- Ch. 15 Sensory Pathways and the Somatic Nervous System17
- Ch. 16 The Autonomic Nervous System and Higher-Order Functions30
- Ch. 17 The Special Senses15
- Ch. 18 The Endocrine System21
- Ch. 19 Blood31
- Ch. 20 The Heart31
- Ch. 21 Blood Vessels and Circulation26
- Ch. 22 The Lymphatic System and Immunity25
- Ch. 23 The Respiratory System4
- Ch. 24 The Digestive System18
- Ch. 26 The Urinary System31
- Ch. 27 Fluids & Electrolytes30
- Ch. 28 The Reproductive System12
- Ch. 29 Development and Inheritance17
Martini, Nath, Bartholomew12th EditionFundamentals of Anatomy and PhysiologyISBN: 9780137854011Not the one you use?Change textbook
Chapter 14, Problem 20
If symptoms characteristic of Parkinson's disease appear, which part of the midbrain is inhibited from secreting a neurotransmitter? Which neurotransmitter is it?
Verified step by step guidance1
Identify the specific part of the midbrain involved in Parkinson's disease symptoms. This is the substantia nigra, a region critical for motor control.
Understand the role of the substantia nigra in normal brain function. It produces and secretes the neurotransmitter dopamine, which helps regulate movement.
Recognize that in Parkinson's disease, the substantia nigra is inhibited or damaged, leading to decreased dopamine secretion.
Connect the decrease in dopamine levels to the characteristic motor symptoms of Parkinson's disease, such as tremors, rigidity, and bradykinesia.
Summarize that the inhibited part is the substantia nigra, and the neurotransmitter affected is dopamine.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Substantia Nigra and its Role in the Midbrain
The substantia nigra is a critical structure in the midbrain involved in motor control. It contains dopaminergic neurons that produce dopamine, which modulates movement and coordination. Degeneration or inhibition of this area leads to motor symptoms characteristic of Parkinson's disease.
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Dopamine as a Neurotransmitter
Dopamine is a neurotransmitter essential for regulating movement, motivation, and reward. In Parkinson's disease, the loss of dopamine-producing neurons in the substantia nigra results in decreased dopamine levels, causing motor symptoms like tremors, rigidity, and bradykinesia.
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Pathophysiology of Parkinson's Disease
Parkinson's disease is a neurodegenerative disorder marked by the progressive loss of dopaminergic neurons in the substantia nigra. This loss disrupts the balance of neurotransmitters in the basal ganglia, leading to impaired motor function and characteristic symptoms such as tremors and stiffness.
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Related Practice
Textbook Question
What varied roles does the hypothalamus play in the body?
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Textbook Question
Briefly summarize the overall function of the cerebellum.
Textbook Question
Stimulation of which part of the brain would produce sensations of hunger and thirst?
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Textbook Question
The only cranial nerves that are attached to the cerebrum are the____ nerves.
(a) optic
(b) oculomotor
(c) trochlear
(d) olfactory
(e) abducens
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Textbook Question
Which structure in the brain is your A&P instructor referring to when talking about a nucleus that resembles a sea horse and that is important in the storage and retrieval of long-term memories? In which functional system of the brain is it located?