Download presentation
Presentation is loading. Please wait.
1
Peripheral Nervous System Chapter 14 – Lecture Notes
to accompany Anatomy and Physiology: From Science to Life textbook by Gail Jenkins, Christopher Kemnitz, Gerard Tortora
2
Chapter Overview 14.1 PNS Connective Tissues 14.2 Cranial Nerves
14.3 Spinal Nerve Branches 14.4 Reflexes 14.5 SNS and ANS 14.6 Anatomy of the ANS 14.7 ANS Signal Transmission 14.8 Sympathetic and Parasympathetic Divisions of ANS 14.9 ANS Reflex Arcs
3
Essential Terms Peripheral Nervous System (PNS)
all parts of nervous system that are not brain and spinal cord Ganglia collections of neuronal cell bodies Somatic nervous system (SNS) associated with voluntary or conscious activities and body sensations Autonomic nervous system operates without conscious control Nerve hundreds to thousands of PNS axons plus associated connective tissue & blood vessels bundled into functional organ
4
Introduction Peripheral nervous system divided into somatic nervous system and autonomic nervous system Somatic nervous system is divided into sensory and motor portions Autonomic nervous system has sympathetic and parasympathetic nervous divisions and innervates enteric plexuses both sympathetic and parasympathetic divisions have motor and sensory components
5
Nerves cranial nerves spinal nerves emerge from brain 12 pair
emerge from spinal cord 31 pair
6
Concept 14.1 PNS Connective Tissue
7
PNS Connective Tissue Layers
endoneurium wraps individual axons perineurium wraps axons bundled into fascicles epineurium wraps entire nerve fuses with dura mater of CNS blood vessels within perineurium and epineruium
8
Figure 14.1a
9
Figure 14.1b
10
Concept 14.2 Cranial Nerves
11
Cranial Nerves 12 pair numbered from anterior to posterior emergence from brain sensory nerves I and II mixed nerves III to XII both sensory and motor neurons
12
Figure 14.2
13
Cranial Nerves Facial Vestibulocochlear Olfactory Gossopharyngeal
Vagus Assessory Hypoglossal Olfactory Optic Oculomotor Trochlear Tigeminal Abducens
14
Cranial Nerves Sensory neurons Motor neurons
cell bodies located in ganglia outside brain Motor neurons cell bodies in nuclei within brain Cranial Nerves III, IV, XI, and XII primarily motor Cranial nerve V largest of cranial nerves Cranial nerve III, VII, IX, X both somatic and autonomic motor axons Cranial nerve VIII primarily sensory
15
Figure 14.3
16
Figure 14.4
17
Figure 14.5
18
Figure 14.6
19
Figure 14.7
20
Figure 14.8
21
Figure 14.9
22
Figure 14.10
23
Figure 14.11
24
Figure 14.12
25
Table 14.1 pt 1
26
Table 14.1 pt 2
27
Table 14.1 pt 3
28
Table 14.1 pt 4
29
Table 14.1 pt 5
30
Table 14.1 pt 6
31
Table 14.1 pt 7
32
Concept 14.3 Spinal Nerve Branches
33
Spinal Nerves 8 pair of cervical nerves 12 pair of thoracic nerves
numbered from superior to inferior associated with vertebral regions 8 pair of cervical nerves 12 pair of thoracic nerves 5 pair of lumbar nerves 5 pair of sacral nerves 1 pair of coccygeal nerves
34
Figure 14.13
35
Spinal Nerve Branches posterior ramus anterior ramus meningeal branch
deep muscles and skin of dorsal trunk anterior ramus limbs and skin of lateral and ventral trunk meningeal branch supplies vertebrae, vertebral ligaments, blood vessels of spinal cord and meninges rami communicans autonomic nervous system
36
Figure 14.14
37
Spinal Nerve Plexuses cervical plexus brachial plexus lumbar plexus
Figure 14.15 brachial plexus Figure 14.16 lumbar plexus Figure 14.17 sacral plexus Figure 14.18 intercostal nerves spinal nerves T2-T12
38
Table 14.2
39
Figure 14.15
40
Table 14.3
41
Figure 14.16a
42
Figure 14.16b
43
Table 14.4
44
Figure 14.17a
Similar presentations
