Cremasteric reflex
The cremasteric reflex is a superficial (i.e., close to the skin's surface) reflex observed in human males.
This reflex is elicited by lightly stroking or poking the superior and medial (inner) part of the thigh—regardless of the direction of stroke.[1] The normal response is an immediate contraction of the cremaster muscle that pulls up the testicle ipsilaterally (on the same side of the body). The reflex utilizes sensory and motor fibers from two different nerves. When the inner thigh is stroked, sensory fibers of the
Clinical conditions
In some males this reflex may be exaggerated which can occasionally lead to a misdiagnosis of cryptorchidism.[3]
The cremasteric reflex may be absent with testicular torsion, upper and lower motor neuron disorders, as well as a spine injury of L1-L2. It can also occur if the ilioinguinal nerve has accidentally been cut during a hernia repair.[4]
The cremasteric reflex can be helpful in recognizing testicular emergencies. The presence of the cremasteric reflex does not eliminate testicular torsion from a differential diagnosis, but it does broaden the possibilities to include
References
- ^ "Definition: cremasteric reflex from Online Medical Dictionary". Archived from the original on 2007-08-13. Retrieved 2007-12-06.
- ISBN 978-0-443-06612-2.
- ^ "Cryptorchidism". The Lecturio Medical Concept Library. Retrieved 20 July 2021.
- PMID 30020720. Retrieved 20 July 2021.
- PMID 30020720. Retrieved 20 July 2021.