Ciliospinal center

Ciliospinal center is a part of the nervous system that controls the dilation and constriction of the pupil and responses to pain and fear. It is located in the spinal cord between the first thoracic (T1) and second cervical (C2) segments.

Anatomy

The ciliospinal center is located in the intermediolateral cell column of the spinal cord. It receives input from the hypothalamus, limbic system, and brainstem, and sends output to the superior cervical ganglion.

Function

The ciliospinal center controls the dilation and constriction of the pupil in response to light and dark conditions. It also plays a role in the body's response to pain and fear, causing the pupils to dilate in these situations.

Clinical significance

Damage to the ciliospinal center can result in Horner's syndrome, a condition characterized by ptosis (drooping of the upper eyelid), miosis (constriction of the pupil), and anhydrosis (lack of sweating) on the affected side of the face.

See also

• Nervous system
• Pupil
• Spinal cord
• Horner's syndrome

References

Ciliospinal center Resources
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