Podcast
Questions and Answers
Which of the following injuries is LEAST likely to directly damage the superficial peroneal nerve?
Which of the following injuries is LEAST likely to directly damage the superficial peroneal nerve?
- Fibula fracture
- Ankle sprain
- Tight-fitting boots
- Calcaneus (heel bone) fracture (correct)
A patient reports numbness on the top of their foot but can still lift their foot normally. Which nerve is MOST likely affected?
A patient reports numbness on the top of their foot but can still lift their foot normally. Which nerve is MOST likely affected?
- Sural nerve
- Deep peroneal nerve
- Superficial peroneal nerve (correct)
- Tibial nerve
Why does damage to the superficial peroneal nerve NOT cause foot drop?
Why does damage to the superficial peroneal nerve NOT cause foot drop?
- The superficial peroneal nerve controls ankle inversion, not dorsiflexion.
- The deep peroneal nerve controls the muscles responsible for lifting the foot. (correct)
- The superficial peroneal nerve only provides sensory information, not motor function.
- Numbness prevents proper foot movement.
A patient has difficulty turning their foot outward. Which movement are they struggling with, and which nerve is potentially damaged?
A patient has difficulty turning their foot outward. Which movement are they struggling with, and which nerve is potentially damaged?
What is the FIRST line of treatment typically recommended for a mild superficial peroneal nerve injury caused by wearing tight shoes?
What is the FIRST line of treatment typically recommended for a mild superficial peroneal nerve injury caused by wearing tight shoes?
Which of the following is the MOST accurate description of the superficial peroneal nerve's primary function?
Which of the following is the MOST accurate description of the superficial peroneal nerve's primary function?
The superficial peroneal nerve branches directly from which major nerve?
The superficial peroneal nerve branches directly from which major nerve?
A patient reports a loss of sensation on the majority of the top of their foot, but retains sensation in the first web space (between the big toe and second toe). Which nerve is MOST likely affected?
A patient reports a loss of sensation on the majority of the top of their foot, but retains sensation in the first web space (between the big toe and second toe). Which nerve is MOST likely affected?
Which two muscles are directly controlled by the superficial peroneal nerve?
Which two muscles are directly controlled by the superficial peroneal nerve?
Damage to the superficial peroneal nerve would MOST directly impact which of the following movements?
Damage to the superficial peroneal nerve would MOST directly impact which of the following movements?
In the lower leg, the superficial peroneal nerve travels distally between which two muscles before becoming more superficial?
In the lower leg, the superficial peroneal nerve travels distally between which two muscles before becoming more superficial?
A patient has intact sensation on the top of their foot and normal foot eversion strength. However, they report numbness on the outer side of their foot. Which nerve is MOST likely affected?
A patient has intact sensation on the top of their foot and normal foot eversion strength. However, they report numbness on the outer side of their foot. Which nerve is MOST likely affected?
Why is understanding the pathway of the superficial peroneal nerve important for foot and ankle surgeries?
Why is understanding the pathway of the superficial peroneal nerve important for foot and ankle surgeries?
Flashcards
Foot Eversion
Foot Eversion
Turning the sole of the foot outward.
Superficial Peroneal Nerve Injury Symptoms
Superficial Peroneal Nerve Injury Symptoms
Numbness/tingling on top of the foot/lower leg, weak eversion, but no foot drop.
Causes of Superficial Peroneal Nerve Injury
Causes of Superficial Peroneal Nerve Injury
Ankle sprains, tight shoes/boots, or fibula fractures.
Foot Drop
Foot Drop
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Superficial Peroneal Nerve Function
Superficial Peroneal Nerve Function
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Superficial Peroneal Nerve
Superficial Peroneal Nerve
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Origin of Superficial Peroneal Nerve
Origin of Superficial Peroneal Nerve
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Two Main Functions of the Nerve
Two Main Functions of the Nerve
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Pathway of the Nerve in Leg
Pathway of the Nerve in Leg
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Sensory Area Supplied
Sensory Area Supplied
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Muscles Controlled
Muscles Controlled
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Function of Fibularis Muscles
Function of Fibularis Muscles
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Skin Areas Supplied by Nerve
Skin Areas Supplied by Nerve
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Study Notes
- The superficial peroneal nerve, also known as the superficial fibular nerve, is located in the lower leg.
- It supports foot movement and sensation on the top of the foot.
- This nerve branches off the common peroneal nerve, originating from the sciatic nerve.
Functions
- The nerve has two primary functions: motor and sensory.
- It controls muscles for foot eversion.
- It enables touch sensation on the top of the foot and lower leg.
Location and Pathway
- The nerve begins near the outside of the knee, at the fibula neck.
- It runs down the leg's outer side, beneath the Fibularis (Peroneus) Longus and Fibularis (Peroneus) Brevis muscles.
- In the lower leg, it moves closer to the skin, spreading across the top of the foot.
Sensory and Motor Function
- The nerve divides into branches, providing sensation to most of the top of the foot and toes, excluding the first web space and the outermost side of the foot.
- It controls the Fibularis Longus and Fibularis Brevis muscles, which facilitate foot eversion.
- These muscles support balance during walking or standing.
- Damage to the superficial peroneal nerve can weaken foot eversion.
Sensory Function
- The nerve supplies sensation to the lower part of the leg, the front and side, and most of the top of the foot and toes.
- It does not cover the first web space or the outermost part of the foot.
Injury and Clinical Relevance
- Injuries can occur due to ankle sprains, tight footwear, or fibula fractures because of its surface proximity.
- Injury symptoms include numbness or tingling on the top of the foot and lower leg, and weakness in foot eversion.
- Foot drop is not a symptom, as the nerve does not control lifting the foot.
- Foot drop involves the inability to lift the front of the foot, caused by damage to the deep peroneal nerve.
Treatment
- Mild cases are treated with rest, avoiding pressure, and physical therapy.
- Severe cases may require surgery to relieve nerve pressure.
Key Points
- It aids in foot eversion
- It provides sensation to most of the top of the foot.
- Injuries lead to foot numbness and weak eversion, but not foot drop.
- It can be affected by ankle sprains, tight shoes, or fibula fractures.
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Description
The superficial peroneal nerve, originating from the sciatic nerve, is located in the lower leg. It supports foot movement and sensation on the top of the foot. The nerve controls muscles for foot eversion and enables touch sensation on the top of the foot and lower leg.
