Podcast
Questions and Answers
What is the primary action of the quadratus plantae muscle?
What is the primary action of the quadratus plantae muscle?
Which nerve innervates the first lumbrical muscle?
Which nerve innervates the first lumbrical muscle?
What is a key functional role of the lumbrical muscles in the foot?
What is a key functional role of the lumbrical muscles in the foot?
Which roots contribute to the innervation of lumbricals #2, #3, and #4?
Which roots contribute to the innervation of lumbricals #2, #3, and #4?
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Which statement about the foot's intrinsic muscles is true?
Which statement about the foot's intrinsic muscles is true?
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What is the primary role of the quadratus plantae muscle in foot biomechanics?
What is the primary role of the quadratus plantae muscle in foot biomechanics?
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Which lumbrical muscle is innervated by the medial plantar nerve?
Which lumbrical muscle is innervated by the medial plantar nerve?
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Which nerve roots are involved in the innervation of the quadratus plantae?
Which nerve roots are involved in the innervation of the quadratus plantae?
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What is the action of the lumbrical muscles #2, #3, and #4 in relation to the proximal interphalangeal joints?
What is the action of the lumbrical muscles #2, #3, and #4 in relation to the proximal interphalangeal joints?
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Which nerve innervates lumbrical #2, #3, and #4?
Which nerve innervates lumbrical #2, #3, and #4?
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Study Notes
Intrinsic Foot Muscles
- Quadratus Plantae: A muscle in the second layer of the foot that helps to straighten the pull of the flexor digitorum longus (FDL).
- Nerve Supply: Innervated by the lateral plantar nerve; roots originate from S2 and S3 spinal nerves.
Lumbricals
-
Lumbrical #1:
- Innervated by the medial plantar nerve.
- Roots from S1 and S2 spinal nerves.
- Primary action is to flex the metatarsophalangeal (MTP) joints of toes 2-5.
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Lumbrical #2, #3, #4:
- Innervated by the lateral plantar nerve.
- Roots from S2 and S3 spinal nerves.
- Functions include extending the proximal interphalangeal (PIP) and distal interphalangeal (DIP) joints of toes 2-4.
Intrinsic Foot Muscles
- Quadratus Plantae: A muscle in the second layer of the foot that helps to straighten the pull of the flexor digitorum longus (FDL).
- Nerve Supply: Innervated by the lateral plantar nerve; roots originate from S2 and S3 spinal nerves.
Lumbricals
-
Lumbrical #1:
- Innervated by the medial plantar nerve.
- Roots from S1 and S2 spinal nerves.
- Primary action is to flex the metatarsophalangeal (MTP) joints of toes 2-5.
-
Lumbrical #2, #3, #4:
- Innervated by the lateral plantar nerve.
- Roots from S2 and S3 spinal nerves.
- Functions include extending the proximal interphalangeal (PIP) and distal interphalangeal (DIP) joints of toes 2-4.
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Description
Test your knowledge on the intrinsic foot muscles, specifically focusing on the 2nd layer muscles including quadratus plantae and the lumbricals. This quiz covers their actions, innervation by the lateral and medial plantar nerves, and associated nerve roots. Ideal for students of anatomy or physiotherapy.
