What is contained in the grey matter of the vertebra?
Nerve cell processes
What's found in the white matter of the vertebra?
What is the role of the nerve cell processes in the vertebra?
Carry information to the brain/other parts of the spinal cord
Attach nerve cells to vertebra
Generation of cerebro spinal fluid
Define a nerve fibre
Axon and neurilemma
Axon and cell body
Dendrites and cell body
Define the neurilemma
Thin sheath around an axon
This sheath around the dendrite
Multinucleated cell body
What is the role of the epineureum?
To hold the fascicles together to form a nerve fibre
To hold the fascicles together to form a nerve
To hold the fascicles together to form a peripheral nerve
What are held together in the fascicle of a nerve?
What holds together the nerve fascicle?
What's the difference between an efferent and an afferent nerve?
Afferent nerves carry signals from the target organ to the CNS
Efferent nerves carry signals away from the CSN to the target organ
Efferent nerves carry signals from the target organ to the CNS
Afferent nerves carry signals away from the CSN to the target organ
What is particular about the cranial nerve?
They carry signals from the brain to the head
They are only found in the midbrain of the brain stem
They allow conscious control of brain function
Where do spinal nerves carry signals to?
From the CNS to the rest of body
Up and down the spinal cord
From the body to the spine
What is the role of the posterior rootlet?
They carry sensory nerves to the CNS from the target organ
They carry motor neurons from the target organ to the CNS
They supply the back of the body with motor nerves
What is the role of the anterior rootlet?
Carry motor neurons from the CNS to the target organ
Carry motor neurons from the target organ to the CNS
Posterior ramus- what does it do?
Supplies posterior trunk with nerves
Supplies posterior trunk with motor neurons
Supplies posterior trunk sensory nerves
What is the role of the anterior ramus?
Supplies anterior trunk with nerves
Supplies upper limbs with motor nerves
Supplies limbs with nerves
Supplies lower limbs with motor nerves
What is a myotome?
A type of food
Spanish for toast
Unilateral area of muscle mass innervated a single spinal nerve
What is a dermatome? -_-
Unilateral area of skin innervated by a single spinal nerve
Act in limbs as they don't have a posterior ramus
Act in limbs as they don't have an anterior ramus
A collection of anterior rami for a limb is called...?
A spinal nerve
What defines a general visceral fibre as opposed to a spinal nerve?
They're from the autonomic system
They form multiple ganglia before reaching the target organ
They decussate multiple times (more than necessary)
General visceral afferent fibres are..
Where are parasympathetic fibres found in the CNS?
Brain stem- Cell bodies III, VII, IX and X
Brain stem- Cell bodies III, VII, and X
Brain stem- Cell bodies VII and X
Where are sympathetic fibres found on the CNS?
What tends to happen to the autonomic visceral fibres?
They tend to join the spinal nerve
They tend to dissercate with the spinal nerve
They branch rapidly inside the limbs
What is the difference between pre- and post- ganglionic neurons?
Pre are myelinated, post are not
Post are myelinated, pre are not
Where are sympathetic ganglia found?
Close to the spinal cord
Close to the target organ
Usually above/below the thoracic region
Rarely above/below the thoracic region
Where are parasympathetic ganglia found?
Away from the spinal cord
Towards the spinal cord
Not always part of the spinal nerve
Always part of the spinal nerve
Nuclei are found in the cranosacral region
Which have a sharper pain sensation?
Visceral afferent fibres
Sensory somatic neurons
Pain is triggered along a somatic nerve- describe the sensation
Well localised pain
What is the cause of referred pain in visceral afferent fibres?
Visceral fibres reference back to the spinal cord, and the nerve bodies can become confused as they serve separate areas
Visceral fibres reference back to the spinal cord, and the nerve fibres can become confused as they serve separate areas