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THE NEURAL TISSUE MARTINI, ANATOMY & PHYSIOLOGY, 9 TH EDITION, CHAPTER # 12 LAB MANUAL, Exercise # 18 Page # 2 PowerPoint Presentation
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THE NEURAL TISSUE MARTINI, ANATOMY & PHYSIOLOGY, 9 TH EDITION, CHAPTER # 12 LAB MANUAL, Exercise # 18 Page # 225. NOTE:. THIS IS A STUDY GUIDE , NOT AN ALL INCLUSIVE REVIEW. THERE MIGHT BE THINGS NOT COVERED BY THIS STUDY GUIDE THAT MIGHT BE ASKED IN YOUR PRACTICUMS /

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THE NEURAL TISSUEMARTINI, ANATOMY & PHYSIOLOGY,9TH EDITION, CHAPTER # 12LAB MANUAL, Exercise#18Page# 225

slide2
NOTE:
  • THIS IS A STUDY GUIDE, NOT AN ALL INCLUSIVE REVIEW.
  • THERE MIGHT BE THINGS NOT COVERED BY THIS STUDY GUIDE THAT MIGHT BEASKED IN YOUR PRACTICUMS /

QUIZZES.

  • STUDENTS ARE RESPONSIBLE FOR READING THEIR TEXBOOK (S) AND FOR ALL THE MATERIAL COVERED DURING THE LABORATORY PERIOD, AS PER THE COURSE SYLLABUS
competency 6 the nervous system
Competency 6: The Nervous System
  • Upon successful completion of this laboratory, the students will be able to demonstrate an understanding of the structural and functional features of the nervous system including the special sense organs by:
    • Identifying the parts of a neuron.
    • Explaining the structural and functional classification of the neurons.
competency 6 the nervous system1
Competency 6: The Nervous System
  • Describing the structure and functions of the supporting cells of the nervous system.
  • Distinguishing between neuron, nerve and track.
  • Explaining the structure and functions of the central nervous system and the cranial nerves.
neural tissue

NEURAL TISSUE

NEURON STRUCTURE

CLASSIFICATION OF NEURONS BY

STRUCTURE

CLASSIFICATION OF NEURONS BY

FUNCTION

SCHWANN CELLS

GREY MATTER

WHITE MATTER

neuron structure
NEURON STRUCTURE
  • CELL BODY (SOMA)
  • NEUROFIBRILS(Black or brown lines in model)
  • F- intracellular transport
  • NISSIL BODIES- Blue in one model & blue with red dots in another model
  • F- protein synthesis
  • DENDRITES- They are short citoplasmatic
  • projections from cell bodies
  • F- to receive the nerve impulse or signal
  • AXON- It is a citoplasmaticprojection from the
  • cell body
  • F-to carry away the nerve impulse or signal
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AXON HILLOCK- The place where the
  • the neurofibrils converge
  • F- trigger zone for nerve impulse
  • AXON TERMINALS- End part of the neuron
  • that connects with another neuron
  • F- to release the neurotransmiter
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Dendrites

Perikaryon

Cell body

Dendritic spines

Dendrite

Nucleus

Nissl bodies (RER

and free ribosomes)

Axon

Telodendria

Mitochondrion

(a)

Regions of a neuron

Axon hillock

Initial segment

of axon

Axolemma

Axon

Telodendria

Golgi apparatus

Neurofilament

Synaptic

terminals

See Figure 12-2

Nucleolus

Nucleus

PRESYNAPTIC CELL

POSTSYNAPTIC CELL

(b)

Structural components of a neuron

neurons by structure
NEURONS BY STRUCTURE
  • ANAXONIC
  • BIPOLAR
  • UNIPOLAR
  • MULTIPOLAR
figure 12 3 a structural classification of neurons

Bipolar neuron

Multipolar neuron

Anaxonic neuron

Unipolar neuron

Dendrites

Dendrites

Initial

segment

Dendrites

Axon

Axon

Axon

Synaptic

terminals

Axon

Synaptic

terminals

Synaptic

terminals

Figure 12-3: A Structural Classification of Neurons
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SCHWANN CELLS- They surround the axon
  • f- to produce the myelin sheath
  • MYELIN SHEATH- Layers of cell membrane that
  • surround the axon (yellow in the models
  • f- to isolate the axon
  • Neurilemma- outermost layer with nucleus

of the Schwann cell

  • NODES OF Ranvier- area between two Schwann cells
  • f- to produce saltatory conduction
  • (jumping conduction), to increase the
  • speed of nerve impulse transmission
neurons by functions
NEURONS BY FUNCTIONS
  • SENSORY (Afferent)- it carries iformation
  • towards the cns (central nervous system)
  • MOTOR (EFFERENT)-It carries information
  • away from cns
  • ASSOCIATION NEURONES OR INTERNEURONS-
  • They carry impulses between
  • sensory & motor neurons located at cns
anatomy of a spinal nerve
Anatomy of a Spinal Nerve

ALFONSO A. PINO. MD.

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GREY MATTER- Non myelinated parts of the
  • Neurons & glia (cell bodies)
  • It forms nuclei in the cns
  • WHITE MATTER- Myelinated fibers
  • It forms tracs in the cns
  • It forms nerves in pns (peripheral
  • nerve system)
white matter cns
WHITEMATTER (CNS)

ALFONSO A. PINO. MD.