Brain function decreases in the elderly for all of the following reasons EXCEPT
A) reflex times increase
B) number of synaptic contacts decline
C) number of neurons decrease significantly
D) conduction velocity decreases
Answer: C
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The Brain and Cranial Nerves
- As we wage, when does brain mass begin to decline?
- Damage to which of these cranial nerves would cause a person to have difficulty seeing objects close to her face?
- The lining of the ventricles develops from the
- If a person is experiencing difficulties smiling, he may have damage in which cranial nerve?
- Which ventricle is located in the middle of the thalamus?
- If the only function of cranial nerve I is olfaction, then the nerve is to be classified as a (blank) nerve
- The cochlear branch of the vestibulocochlear (VIII) nerve terminates in which region of the brain?
- The bulk of the cerebellum is two halves called the cerebellar
- If the only function of the optic (II) nerve is vision, then the nerve is to be classified as a (blank) nerve
- What is a primary function of the facial nerve (VII)?
- A pathologist is doing an autopsy. Where would she find the vestibulocochlear nerve?
- Which branch of the trigeminal nerve travels through the superior orbit fissure?
- A person with damage to the hypoglossal nerve may have a hard time performing which function?
- The olfactory receptor cells are located where?
- If the only function of the trochlear nerve is movement of the eyeballs, then the nerve is to be classified as a (blank) nerve
- At age 20, Dave's brain weighs about 1500 grams (3 pounds). Approximately what will his brain weigh by age 80?
- The hypoglossal nerve originates in the (blank) and supplies the muscles of the (blank)
- Motor axons that control the trapezius muscle originate from the
- Motor impulses from the (blank) nerve exit the jugular foramen and control the sternocleidomastoid muscle of the neck.
- Which of the following structures feature sensory axons of the vagus nerve which pass through the jugular foramen to end in the pons and medulla oblongata?
- Axons of the branchial motor neurons in the vagus nerve supply muscles belonging to which of the following?
- Axons of the cochlear branch sensory neurons extend to
- Sensory axons of the facial nerve
- The ophthalmic branch of the trigeminal nerve
- The trochlear nerve