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The cervical spinal nerve 7 (C7) is a spinal nerve of the cervical segment. [1] It originates from the spinal column from above the cervical vertebra 7 (C7). It runs through the interspace between the C6 and C7 vertebrae.
Following is a list of spinal nerves and points that are characteristically belonging to the dermatome of each nerve: [4] Dermatomes of the lower limb (modified, from Fender, after Foerster) C2 – At least one cm lateral to the occipital protuberance at the base of the skull. Alternately, a point at least 3 cm (1.2 in) behind the ear.
This is true for all spinal nerves except for the first spinal nerve pair (C1), which emerges between the occipital bone and the atlas (the first vertebra). [3] Thus the cervical nerves are numbered by the vertebra below, except spinal nerve C8, which exists below vertebra C7 and above vertebra T1.
The carotid tubercle is also used as a landmark for anaesthesia of the brachial plexus and cervical plexus. The cervical spinal nerves emerge from above the cervical vertebrae. For example, the cervical spinal nerve 3 (C3) passes above C3.
The thyrohyoid branch [1] (also: thyrohyoid branch of ansa cervicalis, [2] or nerve to thyrohyoid (muscle) [2] [3]: 595, 600 ) is a motor branch derived from the cervical plexus [2] [2] [3]: 595, 600 [4]: 457, 709 formed by fibres of (the anterior ramus of [3]: 600 ) the cervical spinal nerve 1 (C1) [3]: 582 [5] [6] [4]: 457, 709 (and - according to some sources - cervical spinal nerve 2 (C2 ...
CT scan of a man presenting with radiculopathy of the left cervical spinal nerve 7, corresponding to spondylosis with osteophytes between the vertebral bodies C6 and C7 on the left side, causing foraminal stenosis at this level (lower arrow, showing axial plane).
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The spinal nerves arise from the spinal column. The top section of the spine is the cervical section, which contains nerves that innervate muscles of the head, neck and thoracic cavity, as well as transmit sensory information to the CNS. The cervical spine section contains seven vertebrae, C-1 through C-7, and eight nerve pairs, C-1 through C-8.
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