Intervertebral Disk of Fourth Cervical Vertebra (C4–C5) (Discus intervertebralis C4–C5)
Educational content only — not medical advice.
Anatomy
The intervertebral disk of the fourth cervical vertebra (C4–C5) connects the C4 and C5 vertebral bodies. It consists of concentric fibrocartilaginous lamellae of the anulus fibrosus surrounding the gelatinous nucleus pulposus. It bears dynamic head-support loads and transmits rotational forces across the mid-cervical segment.
Clinical notes
Herniation of the C4–C5 disk compresses the C5 nerve root, manifesting as deltoid muscle weakness, diminished biceps reflex, and shoulder abductor paresthesia.
Related structures
Educational references
FAQ
What is the role of the Intervertebral Disk of Fourth Cervical Vertebra (C4–C5)?
The intervertebral disk of the fourth cervical vertebra (C4–C5) connects the C4 and C5 vertebral bodies. It consists of concentric fibrocartilaginous lamellae of the anulus fibrosus surrounding the gelatinous nucleus pulposus. It bears dynamic head-support loads and transmits rotational forces across the mid-cervical segment.
Why is the Intervertebral Disk of Fourth Cervical Vertebra (C4–C5) clinically important?
Herniation of the C4–C5 disk compresses the C5 nerve root, manifesting as deltoid muscle weakness, diminished biceps reflex, and shoulder abductor paresthesia.
Source & license
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