What is ipsilateral acoustic reflexes?
Ipsilateral means ‘same side’ and contralateral means ‘opposite side’. The reflexes are always indicated by the probe ear. For both pathways, the loud sound travels through the outer, middle, and inner ear, then along the vestibulocochlear nerve (CNVIII) to the brainstem arriving at the cochlear nucleus.
What does elevated acoustic reflexes mean?
An elevated or ab- sent acoustic reflex threshold is consistent with a middle ear disorder, hearing loss in the stimulated ear, and/or interruption of neural innervation of the stapedius muscle.
What does present acoustic reflexes mean?
The acoustic reflex, also known as the stapedius reflex refers to an involuntary muscle contraction of the stapedius muscle in response to a high-intensity sound sti- mulus.
What is an ipsilateral reflex?
a reflex in which the response occurs on the side of the body that is stimulated.
What do acoustic reflexes measure?
In acoustic reflex testing, acoustic immittance measures are used to assess the neural pathway surrounding the stapedial reflex, which occurs in response to a loud sound (70 to 90dB above threshold). The afferent limb of the stapedial reflex is the ipsilateral eighth nerve, which leads to the brainstem.
What is ipsilateral reflex?
ip·si·lat·er·al re·flex. a reflex in which the response occurs on the side of the body that is stimulated.
What kind of body movements occurs in an ipsilateral reflex?
The stretch and Golgi tendon reflexes work in tandem to control muscle length and tension. Both are examples of ipsilateral reflexes, meaning the reflex occurs on the same side of the body as the stimulus.
What is the physiological significance of reflexes?
a. Reflexes maintain homeostasis (autonomic reflexes) – heart rate, breathing rate, blood pressure, and digestion. ▪ b. Reflexes also carry out the automatic action of swallowing, sneezing, coughing, and vomiting.
What does the occurrence of a contralateral response indicate about the pathways involved?
During initiating pupillary reflexes, what does the occurrence of a contralateral response indicate about the pathways involved? The pathways are connected contralaterally.
What does it mean to be ipsilateral?
(IP-sih-LA-teh-rul) On the same side of the body as another structure or a given point.
What are abnormal reflexes?
Definition. Any anomaly of a reflex, i.e., of an automatic response mediated by the nervous system (a reflex does not need the intervention of conscious thought to occur). [
What can cause abnormal reflexes?
Different types of reflexes can be signs of serious disorders related to the nervous system. Spinal cord injuries are most likely to cause these unusual reflexes, but other disorders that can result in abnormal reflexes include brain tumors, brain trauma, stroke, meningitis, or spinal cord injuries.