Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

13. The Peripheral Nervous System

Sensory Receptor Classification by Location

Anatomy & Physiology

13. The Peripheral Nervous System

Sensory Receptor Classification by Location

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Problem 6

Textbook Question

Match the following nerves with the structures they innervate.

Phrenic nerve
Median nerve
Femoral nerve
Tibial nerve
Radial nerve
Intercostal nerves
Common fibular nerve
Musculocutaneous nerve

a. Motor to the triceps brachii muscle and muscles in the forearm that extend the hand; sensory from the posterior hand
b. Motor to the muscles in the anterior arm that flex the forearm; sensory from skin over the lateral forearm
c. Motor to the muscles in the anterior and lateral leg that evert and dorsiflex the foot; sensory from the skin of the anteroinferior leg
d. Motor to the diaphragm muscle
e. Motor to the muscles in the anterior thigh extend the knee; sensory from the skin over the anterior thigh and leg
f. Motor to the hamstring muscles that extend the thigh and flex the leg, muscles of the leg that plantarflex the foot, and muscles of the foot; sensory from the skin over the posterior and lateral leg and foot
g. Motor to the muscles between the ribs and the abdominal muscles; sensory from the skin over the abdomen
h. Motor to the muscles in the forearm that flex the hand, certain intrinsic hand muscles; sensory from the skin of the anterior hand

Verified step by step guidance

Step 1: Begin by identifying the function of each nerve listed in the problem. For example, the phrenic nerve is primarily responsible for motor innervation to the diaphragm muscle, which is essential for breathing.

Step 2: Match each nerve to its corresponding description based on its anatomical function and sensory/motor innervation. For instance, the median nerve provides motor innervation to muscles in the forearm that flex the hand and certain intrinsic hand muscles, and sensory innervation to the skin of the anterior hand.

Step 3: Continue matching by analyzing the femoral nerve, which provides motor innervation to the muscles in the anterior thigh that extend the knee and sensory innervation to the skin over the anterior thigh and leg.

Step 4: Match the tibial nerve, which innervates the hamstring muscles that extend the thigh and flex the leg, muscles of the leg that plantarflex the foot, and muscles of the foot, while providing sensory input from the skin over the posterior and lateral leg and foot.

Step 5: Complete the matching process by addressing the remaining nerves (radial, intercostal, common fibular, and musculocutaneous) and their respective descriptions, ensuring each nerve is paired with its correct anatomical function and sensory/motor innervation.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Nerve Innervation

Nerve innervation refers to the process by which nerves supply signals to muscles and skin, enabling movement and sensation. Each nerve is responsible for specific muscle groups and areas of skin, which is crucial for understanding how the nervous system controls bodily functions. For example, the phrenic nerve innervates the diaphragm, essential for breathing.

Peripheral Nervous System

The peripheral nervous system (PNS) consists of all the nerves outside the brain and spinal cord, connecting the central nervous system to limbs and organs. It includes motor nerves that control muscle movements and sensory nerves that relay information from the body to the brain. Understanding the PNS is vital for identifying how different nerves, like the median and femoral nerves, function in the body.

Motor and Sensory Functions

Nerves can have motor functions, which involve sending signals to muscles to initiate movement, or sensory functions, which involve transmitting sensory information from the body to the brain. For instance, the radial nerve has both motor functions for arm extension and sensory functions for the posterior hand. Recognizing these functions is essential for matching nerves to their respective structures.

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