HUMB1000 Lecture Notes - Lecture 8: Conus Medullaris, Nerve Fascicle, Medulla Oblongata
19 Jun 2018
School
Department
Course
Professor
Neuron (nerve
cell)
basic structural unit of the nervous system
Axon
nerve fibre
Nerve
bundle of axons (or nerve fibres) and their sheaths (outer covering)
Sensory receptors
separate specialised cells which detect temperature, pain, touch, pressure, light,
sound, odour and other
stimuli
Action potential
electrical signal
Effector organ or
effector cell
the organ, tissue or cell in which an effect or action takes place
Ganglion
Collection of cell bodies located outside the CNS
Plexus
Extensive network of axons or cell bodies
Synapse
Junction of a neuron with another cell e.g. end of a neuron with a muscle cell or
another neuron
Cauda equina
The roots of spinal nerves that extend inferiorly from the lumbosacral
enlargements and the conus medullaris
Cerebellum
A part of the brain which is attached to the brain stem posterior to the pons
Cerebral cortex
The grey matter on the outer surface of the cerebrum
Cervical
Relating to spinal nerves 1-8
Coccygeal
Relating to spinal nerve 31
Conus Medullaris
The region on the spinal cord where the spinal cord tapers to a cone-like shape
Diencephalon
A part of the brain, between the brainstem and cerebrum, which is composed of
the thalamus, subthalamus, epithalamus and hypothalamus
Endocrine
Relating to endocrine glands which secrete hormones into the blood stream
Endoneurium
A delicate connective tissue layer that surrounds an axon and its myelin sheath
Epineurium
A dense connective tissue layer that surrounds nerve fascicles
Fissure
A groove in the brain
Gyrus
Folds on the cerebrum of the brain
Hormone
A chemical substance that is secreted by endocrine glands
Hypothalamus
The most inferior part of the diencephalon
Lumbar
Relating to spinal nerves 21-25
Medulla Oblongata
The most inferior part of the brain stem that is continuous with the spinal cord
Negative feedback
The response to the original stimulus resulting in a smaller deviation from the set
point
Perineurium
A connective tissue layer that surrounds a group of axons
Pituitary
The endocrine gland attached to the hypothalamus
Sacral
Relating to spinal nerves 26-30
Glossary
Monday, 7 May 2018
10:48 AM
Nervous Page 1
Sacral
Relating to spinal nerves 26-30
Sulcus
Grooves on the cerebrum of the brain
Thalamus
The largest part of the diencephalon
Thoracic
Relating to spinal nerves 9-20
Vertebrae
Bones of the vertebral column which encase the spinal cord
Nervous Page 2
Maintaining homeostasis
1.
Receiving sensory input: internal, external
2.
Integrating information
3.
Motor output
4.
Establish and maintain mental activity
5.
Functions of the Nervous System
Monday, 7 May 2018
10:48 AM
Nervous Page 3
Document Summary
Sensory receptors basic structural unit of the nervous system nerve fibre bundle of axons (or nerve fibres) and their sheaths (outer covering) separate specialised cells which detect temperature, pain, touch, pressure, light, sound, odour and other stimuli. Effector organ or effector cell the organ, tissue or cell in which an effect or action takes place. Collection of cell bodies located outside the cns. Junction of a neuron with another cell e. g. end of a neuron with a muscle cell or another neuron. The roots of spinal nerves that extend inferiorly from the lumbosacral enlargements and the conus medullaris. A part of the brain which is attached to the brain stem posterior to the pons. The grey matter on the outer surface of the cerebrum. The region on the spinal cord where the spinal cord tapers to a cone-like shape. A part of the brain, between the brainstem and cerebrum, which is composed of the thalamus, subthalamus, epithalamus and hypothalamus.
