Anatomy - Hearing (Part 2) - Functions of Cochlea & Organ of Corti

The video tutorial explains the journey of sound waves from the external environment through the ear, focusing on the anatomy and function of the cochlea, vestibular and tympanic ducts, and the basilar membrane. It details how different sound frequencies affect the basilar membrane and how these vibrations are translated into signals that the brain interprets as sound. The tutorial also covers the primary auditory pathway, describing how sound information travels from the cochlea to the brain.

What is the first structure that sound waves vibrate when they enter the ear?

• Stapes

• Cochlea

• Oval window

• Tympanic membrane

Which part of the ear is responsible for converting sound vibrations into fluid movements?

• Basilar membrane

• Oval window

• Cochlear duct

• Tympanic membrane

What is another name for the vestibular duct?

• Scala tympani

• Scala media

• Scala vestibuli

• Cochlear duct

What fluid is found in the cochlear duct?

• Blood

• Cerebrospinal fluid

• Endolymph

• Perilymph

What structure in the cochlea is responsible for detecting different sound frequencies?

• Cochlear nerve

• Basilar membrane

• Tectorial membrane

• Oval window

How does the brain perceive the loudness of a sound?

• By the length of the auditory canal

• By the frequency of the sound

• By the intensity of hair cell scraping

• By the size of the cochlea

Which nerve is formed by the fusion of the cochlear and vestibular nerves?

• Optic nerve

• Facial nerve

• Vestibulocochlear nerve

• Trigeminal nerve

What is the role of the primary auditory cortex?

• Identifying the source of sound

• Detecting the presence of sound

• Balancing the body

• Regulating ear pressure

What happens if there is a lesion in the auditory association area?

• Loss of balance

• Inability to identify sound

• Inability to detect sound

• Complete deafness

Which part of the brain is involved in identifying sounds?

• Auditory association area

• Medulla oblongata

• Primary auditory cortex

• Cerebellum