28 Questions
What is the color of the cranial and spinal nerves in dissection?
Grayish white
What supports the nerve fibers (axons) in the cranial and spinal nerves?
Delicate areolar tissue
How many pairs of cranial nerves leave the brain?
12 pairs
What is the pathway through which the cranial nerves pass in the skull?
Foramina
What are the nerve fibers (axons) in the cranial and spinal nerves also known as?
Mahor fibers
What is the main component of the peripheral nervous system?
Cranial and spinal nerves and their associated ganglia
What is the name of the cranial nerve with the number CN I?
Olfactory nerve
What is the function of the ganglia in the peripheral nervous system?
To integrate sensory information
What is the primary role of the peripheral nervous system?
To transmit signals from the brain to the muscles
What is unique about each cranial nerve?
Each has its specific number
What are the cranial nerves named according to?
Their order of emergence from the brain
What is the main region where the cranial nerves are found?
Head and neck
What is the origin of the cranial nerves?
Brain
What is the pathway of the cranial nerves?
From the brain to the peripheral nervous system
What is the distribution of cranial nerves in the body?
Throughout the head, neck, and torso
Which nerve provides motor fibers to the neck and upper back?
Accessory nerve
Which nerve is responsible for sensory information related to taste?
Facial nerve
Which nerve provides motor fibers to the eye muscles?
Oculomotor nerve
Which nerve is responsible for sensory information related to balance and hearing?
Vestibulocochlear nerve
Which nerve provides motor fibers to the pharynx?
Glossopharyngeal nerve
Which nerve is responsible for sensory information related to vision?
Optic nerve
Which nerve provides motor fibers to the face?
Facial nerve
Which nerve is responsible for motor fibers to the tongue?
Hypoglossal nerve
What is the primary function of the Trigeminal nerve?
Sensory for the face and motor fibers to chewing muscles
Which of the following nerves are entirely motor?
Oculomotor, trochlear, abducent, accessory, and hypoglossal nerves
What is the primary function of the Abducent nerve?
Motor fibers to eye muscles
Which of the following nerves are mixed, meaning they have both sensory and motor functions?
All cranial nerves except the olfactory, optic, and vestibulocochlear nerves
What is the primary function of the Olfactory nerve?
Sensory for the nose
Study Notes
Peripheral Nervous System
- Consists of cranial and spinal nerves and their associated ganglia.
- Cranial and spinal nerves are seen as grayish white cords on dissection.
- Made up of bundles of nerve fibers (axons) supported by delicate areolar tissue.
Cranial Nerves
- 12 pairs of cranial nerves that leave the brain and pass through foramina in the skull.
- Named as follows:
- I: Olfactory nerve
- II: Optic nerve
- III: Oculomotor nerve
- IV: Trochlear nerve
- V: Trigeminal nerve
- VI: Abducent nerve
- VII: Facial nerve
- VIII: Vestibulocochlear nerve
- IX: Glossopharyngeal nerve
- X: Vagus nerve
- XI: Accessory nerve
- XII: Hypoglossal nerve
Functions of Cranial Nerves
- Olfactory nerve: sensory for smell
- Optic nerve: sensory for vision
- Oculomotor nerve: motor fibers to eye muscles
- Trochlear nerve: motor fibers to eye muscles
- Trigeminal nerve: sensory for the face; motor fibers to chewing muscles
- Abducent nerve: motor fibers to eye muscles
- Facial nerve: sensory for taste; motor fibers to the face
- Vestibulocochlear nerve: sensory for balance and hearing
- Glossopharyngeal nerve: sensory for taste; motor fibers to the pharynx
- Vagus nerve: motor fibers to neck and upper back
- Accessory nerve: motor fibers to neck and upper back
- Hypoglossal nerve: motor fibers to the tongue
Classification of Cranial Nerves
- Entirely sensory: olfactory, optic, and vestibulocochlear nerves
- Entirely motor: oculomotor, trochlear, abducent, accessory, and hypoglossal nerves
- Mixed: remaining nerves
This quiz covers the basics of cranial nerves, including their numbering and functions, as well as the peripheral nervous system consisting of cranial and spinal nerves and their associated ganglia.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
