Cervical Nerves and Plexus

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Questions and Answers

What does the autonomic nervous system control?

Sensory information from the environment

Cognitive processes, such as thinking and problem-solving

Voluntary movements

Involuntary actions, such as sweating and heart rate (correct)

What is a main function of the somatic nervous system?

Controlling voluntary movements (correct)

Producing hormones

Regulating body temperature

Processing sensory information

How many main subsystems does the peripheral nervous system have?

Four

One

Two (correct)

Three

What is an example of an autonomic process?

Sweating on a hot day Signup and view all the answers

What is the main difference between the autonomic and somatic nervous systems?

The autonomic system is involuntary, while the somatic system is voluntary Signup and view all the answers

Which spinal nerves form the phrenic nerve?

C3/ 4/5 Signup and view all the answers

What is the main function of the musculocutaneous nerve?

Supplying muscles of the forearm and skin of the forearm Signup and view all the answers

Which nerve supplies muscles of the hands?

Ulnar nerve Signup and view all the answers

What is the main function of the obturator nerve?

Supplying the adductor muscles of the thigh Signup and view all the answers

Which spinal nerves form the brachial plexus?

C5 - T1 Signup and view all the answers

What is the main function of the cervical plexus?

Supplying the skin of the face and neck Signup and view all the answers

Which nerve supplies muscles of the anterior neck?

Cervical plexus Signup and view all the answers

What is the main function of the lumbosacral plexus?

Supplying the adductor muscles of the thigh Signup and view all the answers

What is the role of the sympathetic nervous system?

To respond to emergency situations Signup and view all the answers

What is the effect of the sympathetic nervous system on heart rate?

It increases heart rate Signup and view all the answers

What is the role of the parasympathetic nervous system?

To counteract the sympathetic nervous system and restore homeostasis Signup and view all the answers

What type of functions are controlled by thinking about them?

Somatic functions Signup and view all the answers

What is the effect of the sympathetic nervous system on digestion?

It decreases digestion Signup and view all the answers

What is the name of the nervous system that is responsible for involuntary actions such as sweating?

Autonomic nervous system Signup and view all the answers

What is the response triggered by the sympathetic nervous system in times of stress?

Fight or flight Signup and view all the answers

Which of the following is NOT a result of the sympathetic nervous system's 'fight or flight' response?

Increased urinary function Signup and view all the answers

What is the primary function of the autonomic nervous system?

To control involuntary actions Signup and view all the answers

What is the division of the autonomic nervous system that is responsible for promoting relaxation and reducing stress?

Parasympathetic nervous system Signup and view all the answers

What is the autonomic nervous system divided into?

Sympathetic and parasympathetic divisions Signup and view all the answers

What is the sympathetic nervous system responsible for?

Regulating the 'fight or flight' responses Signup and view all the answers

What is a result of the 'flight or fight' response?

Increased alertness and metabolic rate Signup and view all the answers

What is decreased during the 'flight or fight' response?

Digestive and urinary function Signup and view all the answers

What is NOT a result of the sympathetic nervous system?

Increased digestive function Signup and view all the answers

Study Notes

Cervical Plexus

Cervical plexus (C1 - C4) supplies the skin of the face and neck
Other branches supply muscles of the anterior neck
Fibers of C3/4/5 cervical nerves form the right and left phrenic nerve, which supplies the diaphragm

Brachial Plexus

Brachial plexus (C5 –T1) supplies the arm and forearm
Musculcutaneous nerve (a) supplies the arm and skin of the forearm
Ulnar nerve (b) supplies muscles of the forearm, hands, and skin of the hands
Median nerve (c) supplies muscles of the forearm and hands

Lumbosacral Plexus

Lumbosacral plexus (T12 - S5) supplies the Adductor muscles of the thigh
Obturator nerve supplies the Adductor muscles of the thigh

Autonomic Nervous System

Divided into sympathetic and parasympathetic divisions
Sympathetic nervous system responsible for 'flight or fight' responses, including:
- Increased alertness
- Metabolic rate
- Respiration
- Blood pressure
- Heart rate
- Sweating
- Decrease in digestive and urinary function
Parasympathetic nervous system counteracts the responses of the sympathetic system and restores homeostasis

Somatic Nervous System

Functions are managed by thinking about them
Contrasts with autonomic nervous system, which operates automatically

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Description

Quiz about the functions and branches of cervical nerves, including the cervical plexus and its supply to the skin and muscles of the face and neck.