Middle cervical ganglion

The Middle Cervical Ganglion (MCG) is a part of the sympathetic nervous system, specifically the sympathetic chain, which is a part of the autonomic nervous system. It is one of the three cervical ganglia, the other two being the superior cervical ganglion and the inferior cervical ganglion.

Anatomy

The Middle Cervical Ganglion is typically located near the sixth cervical vertebra, although its position can vary. It is the smallest of the three cervical ganglia. It is situated anterior to the vertebral artery and in front of the transverse process of the sixth cervical vertebra, lying on the longus colli muscle.

Function

The Middle Cervical Ganglion provides sympathetic innervation to the thyroid gland, parathyroid glands, and the heart. It sends postganglionic fibers to the heart via the cardiac plexus, and to the thyroid and parathyroid glands directly or through the ansa cervicalis.

Clinical Significance

Due to its role in innervating the heart and thyroid gland, damage or dysfunction of the Middle Cervical Ganglion can lead to various clinical conditions. These include cardiac arrhythmias, hyperthyroidism, and hypothyroidism. It may also be involved in certain types of neck pain and headaches.

See Also

• Sympathetic Nervous System
• Superior Cervical Ganglion
• Inferior Cervical Ganglion
• Cardiac Plexus
• Ansa Cervicalis

References

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  Middle cervical ganglion