chapter 16 Flashcards
what does the Posterior root ganglion contain
Cell bodies of sensory neurons
what does the anterior root contain
Axons of motor neurons
where do Somatic motor neurons start and go through
Starts in anterior horn
Goes through anterior root
where does the Sensory neuron
start and go through
Starts in posterior root ganglion
Branches out to sensory receptors and through the posterior root
Cell body is on the middle of the axon
how would a neuron be killed
If you kill a cell body then the neuron dies
can axons regrow and where can they
In PNS some neurons can regrow their axons
In CNS you can’t regrow neurons
what is the difference between Posterior ramus and Anterior ramus
Posterior ramus
- Goes to back muscles and skin
Anterior ramus
- Goes to limbs and everything else
what is a Dermatome map
Shows what nerve covers what area of the body
what does innate mean
You don’t need to learn it
how many neurons are in the Withdrawal reflex and what are they called and what do they do
3
Sensory
- Stove is hot
Interneuron
- Nerve that connects sensory and motor
Motor
- Signal goes out to muscles to pull away
how many neurons are in the how many neurons are in the Stretch reflex
and what are they called and what do they do
2
No interneuron
Sensory neuron goes straight to motor neuron
whats the difference between Monosynaptic reflex and Polysynaptic reflex
Monosynaptic reflex
- Direct contact between sensory and motor neurons
Polysynaptic reflex
- Interneuron is in between sensory and motor
what happens when you have a spinal cord injury
Long term: loss of conscious motor and sensory below injury
Retains reflexes
what happens if C3,4,5 get injured and what nerve is that
Phrenic nerve
C3, 4, 5
Goes to the diaphragm
what is the parasympathetic innervation of the 3 oculomotor
nerve
Pupil
what is the parasympathetic innervation of the 7 facial
nerve
Salivary glands
what is the parasympathetic innervation of the 9 glossopharyngeal
nerve
Salivary gland
what is the parasympathetic innervation of the 10 vagus
nerve
Slows heart down
Speeds up digestive system
what is the Sympathetic ganglion
a ganglion where the preganglioic and postganglioic neurons meet
Connected by gray ramus and white ramus
On anterior
whats the Sympathetic trunk
- Connection of sympathetic ganglions
