The Nervous System Flashcards Preview

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Flashcards in The Nervous System Deck (27):
1

What is a mixed nerve fibre

Such as inter coastal nerve
Phrenic nerve
Vagus nerve
Carry two or more functional types of nerve fibre to any given region of the body or structure

2

What are the 6 functions a nerve axon can be

Somatic sensory function
Somatic motor
Special sensory
Visceral afferent
Sympathetic
Parasymp

3

What is the cns and pNS

Cns - brain and spinal cord
PNS - nerves out with cns , cranial nerves and spinal nerves, symp chains

4

What are cranial nerves

12 pairs
Connect with brain
Vagus nerve is example

5

What are spinal nerves

31 pairs
Connect with spinal cord
Named branches such as phrenic nerve etc

6

What do spinal nerves supply

The soma body wall
Such as the neck wall, chest wall, diaphragm, abdominal wall, pelvic Walls and the limbs

7

What is the dermatome map

Segmental arrangement of spinal nerves supply to body wall

8

What are some der ate landmarks

T4 - nipples
T10 - umbilicus

9

What are some functions of the nervous system

Allow us to sense our environment and make effective repsonse
Sensory and motor
Protective keep us safe internally and externally

10

Which nervous systems control the internal and external systems

Somatic - external
Autonomic - internal

11

What dos the somatic system Suzy

The soma body wall

12

Where are the somatic nervous system fibres found

Found in spinal nerves branches such as intercostal nerves and phrenic nerves

13

What does somatic sensory fibres do

Supply from skin, parietal pleura, skeletal muscles, bones and joints

14

What does somatic motor nerve fibres do

Supply to skeletal striated muscle including diaphragm

15

What is somatic nervous system in terms of being voluntary

Voluntary not including reflexes

16

What does somatic snensory neurones sense

Touch
Pain
Temperature
Joint position

17

How to somatic motor neurones respond

Skeletal started voluntary muscle move the skeleton appropriately

18

What is the autonomic nervous system in terms of being voluntary

It is involuntary

19

What are some examples of the autonomic nervous system actions

Internal enviro
Heart rate
Blood pressure
Digestion
Glandular sec

20

What are the two parts of e autonomic nervous system

Sympathetic - fight or flight
Parasympathetic - rest and digest

21

What can happen from symp Ns stim

Heart - rate increases
Arterioles - dilate to skeletal muscle and constrict to skin leading to pale and coldness
Skin - makes hair stand on end and produces sweat
Lungs - dilates bronchioles
Gut - reduces motility
Pupils - dilate
Liver - release glucose

22

What does the parasymp system do

Supply same organs as symp except skin and arterioles
Opposes symp

23

What are the branches called that come off of the symp trunk

Splanchinic nerves

24

What are the functions of the spinal nerves - intercostal

Somatic motor
Sensory
Symp to skin and arterioles

25

What are the functions of the vagus nerve

Somatic motor
Somatic sensory
Parasymp
Cranial nerve 10

26

What are two neurotransmitters involved in the symp syst

Noradrenaline - at all organs
Acetylcholine - all para vertebral ganglia

27

What does a neurone consists of

A ganglion
Dendrites
Myelin sheath
Axon - nerve fibre