Podcast
Questions and Answers
Which part of the nervous system consists of the nerves and ganglia located outside the brain and spinal cord?
Which part of the nervous system consists of the nerves and ganglia located outside the brain and spinal cord?
Which cranial nerve is responsible for hearing and equilibrium?
Which cranial nerve is responsible for hearing and equilibrium?
Which division of the peripheral nervous system is utilized by the body for the 'flight and fight' response?
Which division of the peripheral nervous system is utilized by the body for the 'flight and fight' response?
Which segment of the spinal cord do the sympathetic nerves originate from?
Which segment of the spinal cord do the sympathetic nerves originate from?
Signup and view all the answers
Which system is associated with the 'Feed and Breed' response, also known as 'rest and digest'?
Which system is associated with the 'Feed and Breed' response, also known as 'rest and digest'?
Signup and view all the answers
Which cranial nerves are part of the parasympathetic nervous system?
Which cranial nerves are part of the parasympathetic nervous system?
Signup and view all the answers
Study Notes
Peripheral Nervous System
- Consists of nerves and ganglia located outside the brain and spinal cord
- Divided into two groups: Cranial Nerves (CN) and Spinal Nerves (SN)
Cranial Nerves (12 pairs)
- CN I: Olfactory, sensory, responsible for smell
- CN II: Optic, sensory, responsible for vision
- CN III: Occulomotor, motor, responsible for muscle of the eye
- CN IV: Trochlear, motor, responsible for superior oblique
- CN V: Trigeminal, mixed, responsible for face and mouth, mastication
- CN VI: Abducens, motor, responsible for lateral rectus
- CN VII: Facial, mixed, responsible for facial expression, lacrimal and salivary glands
- CN VIII: Vestibulocochlear, sensory, responsible for equilibrium and hearing
- CN IX: Glossopharyngeal, mixed, responsible for throat, swallowing
- CN X: Vagus, mixed, responsible for internal organs
- CN XI: Accessory, motor, responsible for head, neck, shoulders
- CN XII: Hypoglossal, motor, responsible for tongue
Spinal Nerves (31 pairs)
- Divided into: Cervical (8), Thoracic (12), Lumbar (5), Sacral (5), Coccyx (1 fused vertebra)
Autonomic Nervous System
- Composed of Sympathetic and Parasympathetic systems
Sympathetic Nervous System
- Originates from T1-L2/L3 segments of the spinal cord (thoracolumbar)
- Utilized by the body for "Flight or Fight" response
Parasympathetic Nervous System
- Also known as the Cholinergic system
- Also known as the vegetative system
- Responsible for "Feed and Breed" (rest and digest)
- Cranial nerves involved: 3, 7, 9, 10 and S2-S4
- Neurotransmitter: Acetylcholine
Sympathetic Response vs Parasympathetic Response
- Heart Rate: ↑ (Sympathetic), ↓ (Parasympathetic)
- Respiration Rate: ↑ (Sympathetic), ↓ (Parasympathetic)
- Blood Pressure: ↑ (Sympathetic), ↓ (Parasympathetic)
- Visual Acuity: ↑ (Sympathetic, pupillary dilation), ↓ (Parasympathetic, pupillary constriction)
- Sphincters: contracted (Sympathetic), relaxed (Parasympathetic)
- Vascular Response: Vasoconstriction (Sympathetic), Vasodilation (Parasympathetic)
- Metabolism: ↑ (Sympathetic, glucose and fatty acids), ↓ (Parasympathetic, glucose and fatty acids)
- Peristalsis: ↓ (Sympathetic), ↑ (Parasympathetic)
- Salivary Secretion: ↓ (Sympathetic), ↑ (Parasympathetic)
- Ejaculation/Erection: Ejaculation (Sympathetic), Erection (Parasympathetic)
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
This quiz provides an overview of the Peripheral Nervous System, including its components and divisions such as Cranial Nerves and Spinal Nerves. It also covers the functions of different cranial nerves. Test your knowledge on the PNS with this quiz!
