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Cervical Disc

Cervical disc disease

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Cervical Disk Disease Herniation of a lower cervical disk is a common cause of neck, shoulder, arm, or hand pain. Neck pain (worse with movement), stiffness, and limited range of neck motion are common. With nerve root compression, pain may radiate into a shoulder or arm. Extension and lateral rotation of the neck narrows the intervertebral foramen and may reproduce radicular symptoms (Spurling's sign). In young people, acute cervical nerve root compression from a ruptured disk is often due to trauma. Subacute radiculopathy is less likely to be related to a specific traumatic incident and may involve both disk disease and spondylosis. Cervical disk herniations are usually posterolateral near the lateral recess and intervertebral foramen. The usual patterns of reflex, sensory, and motor changes that accompany specific cervical nerve root lesions are listed in Table 16-2. When evaluating patients with suspected cervical radiculopathy it is important to consider the following: (1) overlap in function between adjacent nerve roots is common, (2) the anatomic pattern of pain is the most variable of the clinical features, and (3) the distribution of symptoms and signs may be evident in only part of the injured nerve root territory.

Table 16-2: Cervical Radiculopathy-Neurologic Features

Cervical Nerve Roots

Motor

Sensory

Pain Distribution

 

C5

Biceps

Over lateral deltoid

Supraspinatus (initial arm abduction)
Infraspinatus (arm external rotation)
Deltoid (arm abduction)
Biceps (arm flexion)

Lateral arm, medial scapula

 

C6

Biceps

Thumb, index fingers
Radial hand/forearm

Biceps (arm flexion)
Pronator teres (internal forearm rotation)

Lateral forearm, thumb, index finger

 

C7

Triceps

Middle fingers
Dorsum forearm

Triceps (arm extension)
Wrist extensors
Extensor digitorum (finger extension)

Posterior arm, dorsal forearm, lateral hand

 

C8

Finger flexors

Little finger
Medial hand and forearm

Abductor pollicis brevis (abduction D1)
First dorsal interosseous (abduction D2)
Abductor digiti minimi (abduction D5)

4th and 5th fingers, medial forearm

 

T1

Finger flexors

Axilla and medial arm

Abductor pollicis brevis (abduction D1)
First dorsal interosseous (abduction D2)


Abductor digiti minimi (abduction D5) Medial arm, axilla


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