Flashcards
L8 - Nervous System
Cards in this deck (32)
- 1Dorsal part of neural tube is for...Sensation and input
- 2Ventral part of neural tube is for...motor activity and output
- 3Integrating neurons form where in the neural tube?in between the dorsal and ventral
- 4Origin of Nerves- wall of the neural crest (form most of sensory, somatic sensory)
- neural tube (form most of motor system and integrating neurons) - 5Ependymal Cells- glial cells found in CNS
- stem cells of all neurons
- ependyma; layer still persists in adult neural tube - 6Neural Tube Derivatives- brain and spinal cord = CNS
- 7Rostral Expansion of the Neural Tube- rostral end starts to form brain vesicles (wk 7)
- walls of the tube expand, fold, increase in size differentially
- folding in brain: increase surface area - more neurons, more surface area
- especially intense folding of cortex area - 8Telencephalon forms...the cerebrum
- 9Rhombencephalon forms...the hindbrain
- 10Formation of Ventricles- central canal expands inside forebrain to form ventricles
- 11Choroid Plexus- fold of very fine blood vessels located in lining of ventricles
- lateral, 3rd, 4th, down the spinal cord - 12Where is CSF reabsorbed into?Large venous sinus (superior sagittal sinus)
- 13Lateral Ventricle- 1st and 2nd joined together
- 14Cerebral Aqueduct- tube joins the lateral and 3rd aquaduct
- 154th Ventricle- rhomboid shaped space in front of cerebellum
- part of hindbrain - 16Different Terms for White Matter- capsule
- bundle
- fasciculus
- filet
- peduncle
- tract
- column
- crus
- pyramid - 17What is white matter?- myelinated neuronal processes
- due to myelin on axons
- concentration of fibres - 18What is grey matter?- concentrated cell bodies
- relative density of cell bodies vs fibres gives grey appearance - 19CNS Glial Cells- ependymal
- astrocyte
- microglia
- oligodendroglia - 20PNS Glial Cells- Schwann
- satellite - 21Layers of Connective Tissue Covering of the PNS- epnineurium
- perineurium
- endoneurium - 22Thalamus- two big clusters of grey matter on either side of the 3rd ventricle
- integrates/sorts out our sensory information - 23Globus pallidus- pale shell
- paler due to kinds of shells
- integrating motor - 24Spinal cord finishes at which vertebrae?L2
- 25Neural Crest Produces- dorsal root ganglia
- ganglia of sympathetic and parasympathetic
- melanocytes
- adrenal gland
- neuroendocrine cells - enteroendocrine cells in gut - 26Types of Neurons- Sensor
- Integrative: bipolar, interneuron, pyramidal, purkinje
- Motor neuron - 27What do glial cells do?- support and protect neurons
- important for nutrition, protection, blood brain barrier - 28Oligodendroglia- glial cell which wraps up a few nerves
- problem for regenerating nerve fibres - 29Are most post ganglion nerves of the autonomic system are non-myelinated or myelinated?non-myelinated
- 30Microglia- a macrophage
- comes from blood system
- important in clearing up debris - 31Astrocyte- star shaped cell
- act as barrier around neuron
- intermediary between neuron and blood cells/blood vascular system
- protect neurons - 32Node of Ranvier- facilitates rapid 'saltatory' conduction
- gap in myelin sheath of nerve, between adjacent Schwann cells
Information
- Description
- IMED2004 (Anatomy) Flashcards on L8 - Nervous System, created by Diane Nguyen on 22/08/2017.
- Created by
- Diane Nguyen · Aug 2017
- Updated
- Aug 23, 2017
- Views
- 0
- Rating