What is the pathway of the acoustic reflex?

The acoustic reflex involves sound-elicited middle ear muscle contraction via a neural chain comprising the eighth nerve, cochlear nucleus, superior olivary complex, and ipsi- and contralateral medial facial nerve motoneurons. Acoustic reflexes are recorded using a tympanometer.

How do you perform an acoustic reflex test?

How to perform acoustic reflex testing

1. Alert the client that they will hear some loud sounds in either ear.
2. Place the immittance probe (probe used for tympanometry) into the ear you want to test.
3. Perform tympanometry first.
4. Press Start.

What 2 pathways can activate acoustic reflex?

From VCN the reflex has two main neural pathways: one passes from the VCN directly to the ipsi- lateral facial motor nucleus (CN VII) that Page 2 2 directly innervates the stapedius muscle via the facial nerve and its stapedius branch; the other passes from the VCN to the superior olivary complex (SOC) before the …

Which is a model of the acoustic reflex pathway?

Figure 1 provides a model of the acoustic reflex pathway. It bears just about no resemblance to the actual anatomical structures which are extremely small, three dimensional and much more complex in terms of the nerve projections. However, this figure illustrates the main ART pathways and most of the key structures. Figure 1.

How are acoustic reflexes related to hearing threshold?

Acoustic reflexes do not measure hearing threshold. Rather, they measure reflected energy which is a function of stapedius muscle contraction; it allows one to indi-rectly assess the middle ear, cochlea and neural innervation of the stapedius muscle. As the acoustic reflex is involuntary and

Which is the simplest of the auditory reflexes?

The Stapedial Reflex The simplest of the auditory reflexes is the stapedial reflex. This reflex, sometimes referred to as the acoustic reflex, is a contraction of the stapedial muscle in the middle ear, which is elicited by high-level sounds, especially those of low frequency.

What are the pathways of the acoustic nerve?

Pathways of the ipsilateral stapedius reflex. During the acoustic stimulation, electric impulses form the sensory cells in the cochlea are transmitted through the primary acoustic neurons to the ventral cochlear nucleus. The primary acoustic neurons constitute the acoustic nerve.