Textbook Question
What three types of mechanoreceptors respond to stretching, compression, twisting, or other distortions of their plasma membrane?
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Ch. 15 Sensory Pathways and the Somatic Nervous System
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
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Martini, Nath, Bartholomew 12th EditionCh. 15 Sensory Pathways and the Somatic Nervous SystemProblem 5
Martini, Nath, Bartholomew 12th EditionCh. 15 Sensory Pathways and the Somatic Nervous SystemProblem 5Chapter 15, Problem 5
Identify and shade in the locations of all the ascending sensory tracts in the following diagram of the spinal cord.
Verified step by step guidance1
Step 1: Understand that ascending sensory tracts carry sensory information from the body to the brain. These tracts are located in the white matter of the spinal cord, specifically in the dorsal (posterior) and lateral funiculi.
Step 2: Identify the dorsal (posterior) funiculus, which is the area of white matter located between the dorsal root entry zone and the posterior median sulcus. This region contains ascending sensory tracts such as the fasciculus gracilis and fasciculus cuneatus.
Step 3: Locate the lateral funiculus, which is the white matter area on the lateral sides of the spinal cord. This region contains ascending sensory tracts like the spinothalamic tract and spinocerebellar tracts.
Step 4: Shade the dorsal funiculus (posterior white column) and the lateral funiculus on the diagram to represent the locations of the ascending sensory tracts.
Step 5: Confirm that the anterior (ventral) funiculus is not shaded, as it primarily contains descending motor tracts, not ascending sensory tracts.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Ascending Sensory Tracts
Ascending sensory tracts are bundles of nerve fibers in the spinal cord that carry sensory information from the body to the brain. These tracts transmit signals such as touch, pain, temperature, and proprioception. Understanding their location helps in identifying how sensory information is processed and relayed.
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Sensory Receptors
Spinal Cord Anatomy and Cross-Section
The spinal cord cross-section shows gray matter (butterfly-shaped) surrounded by white matter. The white matter contains ascending and descending tracts. The dorsal (posterior) root carries sensory fibers into the spinal cord, while the ventral (anterior) root carries motor fibers out. Recognizing these structures is essential for locating sensory tracts.
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Guided course
01:57Anatomical Planes & Sections Example 2
Dorsal Root and Sensory Input
The dorsal root contains afferent sensory neurons that enter the spinal cord carrying sensory information from peripheral receptors. This root connects to the dorsal horn of the gray matter, where sensory processing begins. Identifying the dorsal root is key to understanding the pathway of ascending sensory tracts.
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2:47Sensory Receptors
Related Practice
Textbook Question
_______ receptors are normally inactive, but become active for a short time whenever there is a change in the modality that they monitor.
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Textbook Question
The larger the receptive field, the
(a) Larger the stimulus needed to stimulate a sensory receptor
(b) Fewer sensory receptors there are
(c) Harder it is to locate the exact point of stimulation
(d) Larger the area of the somatosensory cortex in the brain that deals with the area
(e) Closer together the receptor cells
Textbook Question
What are the three major somatic sensory pathways and their functions?
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Textbook Question
Identify six types of tactile receptors located in the skin, and describe their sensitivities.
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Textbook Question
The CNS interprets information entirely on the basis of the
(a) Number of action potentials that it receives
(b) Kind of action potentials that it receives
(c) Line over which sensory information arrives
(d) Intensity of the sensory stimulus
(e) Number of sensory receptors that are stimulated
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