How Do You Spell GEIGEL'S REFLEX?

Pronunciation: [d͡ʒˈe͡ɪd͡ʒə͡lz ɹˈiːflɛks] (IPA)

Geigel's reflex is a medical term used to describe the reflexive contraction of the anal sphincter when the glans penis is stimulated. The spelling of this word in IPA phonetic transcription is /ˈɡaɪɡəlz ˈriːflɛks/. The first syllable "Gei" is pronounced as "guy" and the second syllable "gel" is pronounced as "gull". The stress is on the second syllable "gel". The last syllable "reflex" is pronounced as "ree-fleks". This reflex is named after the German neurologist Arnold Geigel, who first reported it in 1884.

GEIGEL'S REFLEX Meaning and Definition

  1. Geigel's reflex, also known as the oculocardiac reflex (OCR), is a physiological response characterized by a decrease in heart rate (bradycardia) in response to direct pressure or traction on the eyeball. This reflex was first described by the German physician and surgeon Wilhelm Geigel in 1913.

    The oculocardiac reflex is a trigeminovagal reflex that involves the trigeminal nerve (cranial nerve V) and the vagus nerve (cranial nerve X). When pressure is applied to the eyeball or there is traction on the eyeball, it stimulates the sensory fibers of the trigeminal nerve, which transmit the signal to the brainstem. The brainstem then activates the parasympathetic fibers of the vagus nerve, leading to a decrease in heart rate. The oculocardiac reflex is typically more pronounced in children and young adults compared to older individuals.

    Geigel's reflex can be elicited during eye examinations, eye surgeries, and various other procedures involving the eye or its surrounding structures. Although bradycardia is the primary response, other symptoms such as nausea, vomiting, hypotension, and arrhythmias may also occur. In some rare cases, severe bradycardia or cardiac arrest may result from intense stimulation of the reflex.

    Due to the potential adverse effects of Geigel's reflex, medical professionals often take appropriate precautions to minimize its occurrence during eye-related procedures. This may involve the use of local anesthetic agents, anesthetic eye drops, or implementing eye protection techniques. Additionally, monitoring of the patient's vital signs, particularly heart rate, is crucial to detect any abnormal physiological responses and intervene promptly if necessary.

  2. On gently stroking the inner side of the thigh there is a contraction of the muscular fibers at the upper edge of Poupart's ligament, the analogue in woman of the cremasteric reflex.

    A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.

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