Nerves of the Upper Limb (Exam IV) Flashcards
Responsible for conscious control of muscles & conscious awareness of sensation to the upper limb:
Somatic control
Vessels, certain glands of the skin, & some lymph structures that all contain smooth muscle components will receive what type of innervation?
Autonomic innervation
Any sort of glandular secretion is usually going to be _____ function however what is the exception here?
Parasympathetic function
Exception: sweat glands
Sweat glands & goosebumps are under the control of:
Sympathetics
Provides somatomotor & somatosensory innervation to the upper extremity
Brachial plexus
What type of innervation to the upper extremities does the brachial plexus provide?
Somatomotor & somatosensory
The brachial plexus arises from the _____ rami of what spinal nerve roots?
Anterior rami of spinal nerve roots C5-T1
The brachial plexus arises form the ______ of the spinal cord
Cervical enlargement
The brachial plexus provides innervation to the:
Upper limbs & shoulder
Between C4 & C5 spinal nerve roots we may see some ______
Overlap
Even though some overlap may be seen between C4 & C5 spinal nerve roots, C4 is considered part of the ____ while C5 is considered part of the _____
Cervical plexus
Brachial plexus
The spinal nerve roots that make up the brachial plexus emerge from the ______ of cervical vertebral & pass through the _______ & ______ muscles (also referred to was the _____ space) of the neck
Intervertebral formamina
Anterior & middle scalene muscles
Interscalene
Usually indicative of a lot of spinal cord nerves coming off that part of the spinal cord segment:
Spinal cord enlargment
The cervical enlargement gives rise to:
The brachial plexus & part of the cervical plexus
Roots of the brachial plexus:
C5, C6, C7, C8, T1
The spinal cord has dorsal roots which are _____ & ventral roots which are _____
Sensory
Motor
When we talk about roots being dorsal or ventral (sensory or motor) they have to be one or the other- NOT mixed & they come together to form the:
Spinal nerve root
When we talk about somatic plexuses, we talk about the roots of the plexuses, and in this case, the term root is referring to the:
Spinal nerve
When talking about somatic plexuses, and using the term root meaning the spinal nerve here it is:
Mixed motor & sensory
Examples of some somatic plexuses:
Brachial plexus, lumbar plexus, sacral plexus
The spinal nerves are emerging through the openings between the articulated vertebral segments called:
Intervertebral foramina
Describe the location of the intervertebral foramina in relationship to the vertebral bodies:
Posterior & lateral to the vertebral bodies
Intervertebral foramina is where we see the:
Spinal nerve roots emerge
The brachial plexus is solely composed of _____ rami, so tat means that all of the structures we see in the upper limb are derived _____
Ventral
Hypaxially
The brachial plexus is made up of the ______ ______ ______ of cervical & thoracic spinal nerves C5-T1
Anterior ventral rami
