Podcast
Questions and Answers
What is the general pattern of dermatomes along the arms and legs?
What is the general pattern of dermatomes along the arms and legs?
How many cervical nerves are there, and which one is an exception with no dermatome?
How many cervical nerves are there, and which one is an exception with no dermatome?
What is an area of skin innervated by a single nerve called?
What is an area of skin innervated by a single nerve called?
What is the embryonic structure to which the term dermatome also refers?
What is the embryonic structure to which the term dermatome also refers?
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What are the precise areas of innervation by dermatomes compared to in uniqueness?
What are the precise areas of innervation by dermatomes compared to in uniqueness?
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What is the term used to refer to a part of an embryonic somite?
What is the term used to refer to a part of an embryonic somite?
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What is the number of thoracic nerves supplying the dermatomes?
What is the number of thoracic nerves supplying the dermatomes?
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What is the term for an area of skin innervated by a single nerve?
What is the term for an area of skin innervated by a single nerve?
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What is the number of sacral nerves supplying the dermatomes?
What is the number of sacral nerves supplying the dermatomes?
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What is the general pattern of dermatomes along the thorax and abdomen?
What is the general pattern of dermatomes along the thorax and abdomen?
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Study Notes
Dermatomes Overview
- Dermatomes are specific skin areas innervated by sensory fibers from a single spinal nerve root.
- They exhibit a distinctive pattern in the arms and legs, with dermatomes overlapping at their borders.
Cervical Nerves
- There are eight cervical nerves in total (C1-C8).
- C1 is the exception, as it has no associated dermatome.
Embryonic Structures
- The term "dermatome" also refers to a part of an embryonic somite, which contributes to the development of the skin.
Area of Skin Innervation
- An area of skin innervated by a single nerve is called a dermatome.
Thoracic Nerves
- Twelve thoracic nerves (T1-T12) supply dermatomes, correlating with rib levels.
Sacral Nerves
- Five sacral nerves (S1-S5) contribute to dermatomes, addressing innervation in the lower back and legs.
Thorax and Abdomen Dermatomes
- Dermatomes in the thorax and abdomen follow a segmental arrangement aligned with vertebrae, displaying clear horizontal bands that reflect the underlying spinal cord segments.
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Description
Test your knowledge of dermatomes with this quiz! Explore the sensory regions of the skin and their corresponding spinal nerves. Learn about the distribution of sensation and pain in the body.
