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Canalicular syndromes description

Pronator teres syndrome

Entrapment of the median nerve at the proximal forearm anteriorly.

Is rare. It is a sensitive affectation in the palm aspect of the first three fingers and a skin disorder of the thenar eminence.

 

Carpal tunnel syndrome

Is the most common canalicular syndrome of the upper extremity. Is a compression of the median nerve at the wrist. It produces changes in the palmar sensitivity of the first three fingers and tingling, that increase at night and are triggered by certain movements.

 

Anterior interosseous nerve syndrome

It is a compression of the motor branch of the median nerve at the forearm, weakness and loss of strength in the first and second fingers with difficulty bending the interphalangeal joint of the thumb and the distal interphalangeal joint of the index finger. Patient notice this syndrome bacause of a writting clumsiness.

 

Ulnar nerve entrapment at the elbow

It is the second most common canalicular syndrome, it produces tingling and loss of sensation in the anterior aspect of the 4th and 5th fingers with pain in the medial aspect of the elbow and forearm. If the entrapment is longstanding motor disturbances may occur as 4th and 5th fingers claw and interosseous muscle atrophy.

 

Guyon canal trapping

It produces sensitive and motor symptoms. There is not involvement of the dorsal ulnar branch, if it is severe produces an ulnar claw.

 

Entrapment of the posterior interosseous nerve

Motor symptoms with loss of fingers extension. Wrist extension is preservated but with radial deviation.

 

Sensory branch of radial nerve entrapment (Wartenberg’s syndrome)

It produces a strong pain and paresthesia in the dorsal aspect of the thumb, 2nd and 3rd fingers.

 

Pyramidal syndrome

Deep pain in the hip region and buttock that may radiate to the back of the thigh and reach the knee, without loss of muscle strength.

 

Common peroneal nerve (external popliteal nerve) entrapment

Pain and tingling in the lateral side of the leg and dorsal aspect of the foot. Loss of strength of the anterior muscular compartment of the leg with difficulty for  ankle, fingers and feet extension.

 

Tarsal canal syndrome

It is the most common lower limb entrapment syndrome, produces a  burning sensation in the fingers and sole, pain behind the medial malleolus that can be irradiated backwards to the leg.

 

Morton's neuroma

Severe pain in the intermetatarsal space with tingling in the fingers that increases withstanding and ambulation.

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