Lab 4 Flashcards
What are the spinal nerve roots that form the cervical plexus?
C3 - C5
The cervical plexus is crucial for innervating muscles and providing sensation in the neck and diaphragm
Which nerve is responsible for diaphragm movement?
Phrenic nerve
The phrenic nerve arises from the cervical plexus and is essential for breathing
What is the primary function of the vagus nerve (X)?
Autonomic control of the heart, lungs, and digestive tract
The vagus nerve is a key component of the parasympathetic nervous system
Which nerve is associated with the pinky finger?
Ulnar nerve
The ulnar nerve controls sensation and movement in the pinky and part of the ring finger
What is the spinal nerve root range for the lumbar plexus?
L2 - L4
The lumbar plexus innervates the lower abdominal wall and parts of the lower limbs
What are the main nerves that arise from the brachial plexus?
- Median
- Radial
- Ulnar
The brachial plexus is responsible for innervating the upper limb
What is the function of the femoral nerve?
Innervates the quadriceps and helps in knee extension
The femoral nerve is a major nerve of the lumbar plexus
What is the spinal nerve root range for the sacral plexus?
L4 - S3
The sacral plexus innervates the pelvic region and lower limbs
Fill in the blank: The _______ nerve is responsible for thumb movement.
Radial
The radial nerve innervates the muscles that extend the wrist and fingers
What does the phrase ‘C3 - C5. keep us alive’ refer to?
Cervical plexus innervation
This phrase emphasizes the importance of the cervical plexus for respiration through the diaphragm
What is the function of the muscles served by the sacral plexus?
Muscles below the knee
The sacral plexus controls movements in the lower leg and foot
Which nerve is responsible for bending the knee?
Sciatic nerve
The sciatic nerve innervates muscles that flex the knee
What is the spinal nerve root range for the brachial plexus?
C5 - T1
What role does the VAGUS NERVE play in homeostasis?
Regulates the parasympathetic NS including heart rate, respiratory rate, and gut/brain connection
The VaGus NeRve is essential for maintaining balance in bodily functions.
What are the paired cranial nerves?
- Sensory: optic, olfactory
- Mixed: vagus
- Motor: oculomotor
Each type has distinct functions related to sensory input and motor control.
What functions are associated with the OLFACTORY NERVE?
Receives stimuli and transmits information for processing
The Olfactory NeRve is primarily responsible for the sense of smell.
What is the function of the OCULOMOTOR NERVE?
The OCULOMOTOR NERVE controls most of the eye’s movements.
What happens when herniated disks affect the spinal nerve?
They compress the spinal nerve; causing pain, tingling and numbness.
What are the components surrounding nerves and nerve bundles?
- Epineurium
- Perineurium
- Endonerium
These layers provide protection and support for nerve fibers.
What is the DORSAL ROOT’s role in the spinal nerve?
Contains sensory neurons that transmit information to the spinal cord
The DORSAL ROOT is crucial for sensory input.
What is the VENTRAL RAMUS’s role in the spinal nerve?
Contains motor neurons that send information away from CNS
What is the function of the SYMPATHETIC GANGLION?
Part of the sympathetic nervous system, involved in the fight-or-flight response
SYMPATHETIC GANGLION helps prepare the body for stressful situations.
Fill in the blank: The _______ connects the spinal cord to the peripheral nervous system.
Spinal Nerve
Spinal nerves are key conduits for sensory and motor information.
What is the role of the DORSAL ROOT GANGLION?
Contains the cell bodies of sensory neurons
The DORSAL ROOT GANGLION is essential for relaying sensory information to the central nervous system.
Describe the pathway for visual stimulus to the brain.
- OPTIC NERVE receives info
- OPTIC CHIASM converges vision from both eyes into one image
- OPTIC TRACT brings info to brain (occipital lobe)
Describe pathway for olfactory stimuli to the brain.
- Nerves on the OLFACTORY BULB receives info
- OLFACTORY BULB processes the information
- OLFACTORY TRACT sends info to brain
Fill in the blanks.
Fill in the blanks.
- OLFACTORY NERVE
- OCULOMOTOR NERVE
- OPTIC NERVE
Fill in the blanks.
Fill in the blanks.
Fill in the blanks.
Identify the correct spinal nerve.
Dorsal Ramus/Ventral Ramus/Rami Communicantes
- Serves deep muscles of skin and back: _____
- Serves the sympathetic NS: _____
- Some branch out to form plexuses: _____
- Dorsal Ramus
- Rami Communicantes
- Ventral Ramus
