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?
- Longitudinal (correct)
- Circular
- Irregular
- Radial
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?
- 7 cervical nerves, C6
- 9 cervical nerves, C7
- 8 cervical nerves, C1 (correct)
- 8 cervical nerves, C2
What is an area of skin innervated by a single nerve called?
What is an area of skin innervated by a single nerve called?
- Somite
- Nerve plexus
- Peripheral nerve field (correct)
- Dermatome
What is the embryonic structure to which the term dermatome also refers?
What is the embryonic structure to which the term dermatome also refers?
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?
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?
What is the number of thoracic nerves supplying the dermatomes?
What is the number of thoracic nerves supplying the dermatomes?
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?
What is the number of sacral nerves supplying the dermatomes?
What is the number of sacral nerves supplying the dermatomes?
What is the general pattern of dermatomes along the thorax and abdomen?
What is the general pattern of dermatomes along the thorax and abdomen?
Flashcards
Cervical Nerves
Cervical Nerves
There are 8 cervical nerves, and C1 is an exception that doesn't have a dermatome.
Thoracic Dermatomes
Thoracic Dermatomes
12 thoracic nerves supply dermatomes.
Sacral Dermatomes
Sacral Dermatomes
5 sacral nerves supply dermatomes.
Dermatome Pattern (Arms/Legs)
Dermatome Pattern (Arms/Legs)
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Dermatome (Skin Area)
Dermatome (Skin Area)
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Peripheral Nerve Field
Peripheral Nerve Field
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Dermatome (Embryonic)
Dermatome (Embryonic)
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Dermatome Uniqueness
Dermatome Uniqueness
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Dermatome Pattern (Thorax/Abdomen)
Dermatome Pattern (Thorax/Abdomen)
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Somite (Embryonic Structure)
Somite (Embryonic Structure)
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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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