Create
Learn
Share

PNS- Spinal Cord + Spinal Nerves

rename
taylormaloney's version from 2015-12-06 01:05

Section 1

Question Answer
What is the approximate length of the Spinal Cord?42-45cm (CI-LI/LII)
How many Segments are in each section of the Spinal Cord?8 Cervical, 12 Thoracic, 5 Lumbar, 5 Sacral, 1 Coccygeal.
How many enlargements are there to the SC? Where are they?2, Cervical + Lumbar.
What is the Conus Medullaris?The most inferior point of the Spinal Cord.
What is the Cauda Equina?Nerves that occupy space inferior to the Conus Medullaris.
memorize

Section 2

Question Answer
What is Gray Matter?The most centralized portion of the SC Internal Structure.
How is Gray Matter divided?3 Horns. Ant- Motor. Post- Sensory. Lateral- Autonomic -distributed by Ventral Horn.
What is White Matter?The more external layer of SC Internal Structure.
How is White Matter divided?3 Columns. Ant, Post, Lateral. - All contain mixed nerve tracts.
memorize

Section 3

Question Answer
What are Rootlets + Roots?The first and second division after Spinal Cord. Axons of neurons, pure motor or sensory.
What is the Ventral Rami?The Anterior portion, mixed nerve that join to form Plexii. ( 75% )
What is the Dorsal Rami?The Posterior portion, supplies some mm of back + skin covering them. ( 25% )
Where does a 'Nerve Fibre' begin?Where the Anterior + Posterior Roots Join.
What is the function of Rami Communicantes?To join the Sympathetic NS.
What is the function of Meningeal Rami?To innervate meninges + vertebral ligaments.
memorize

Section 4

Question Answer
How many pairs of spinal nerves are there?31.
How are they broken down ?Cervical- C1-C8, Thoracic- T1-T12, Lumbar- L1-L5, Sacral- S1-S5, 1 Coccygeal.
Where do they correspond to vertebrae?Cervical- Above C Vertebrae. All other- Below Vertebrae.
Nerve Roots below ________, form the ________.L1, form Cauda Equina.
Vertebrae of T2 = _______ level of Spinal Cord? Vert T10= _______ level SC. Vert L1= ________ level SC.T2- T3 SC. T10- T12 SC. L1- L3 or L4 SC.
memorize

Section 5

Question Answer
What is Dura Mater?Dense Irregular CT, mechanical protection of SC.
What is Arachnoid Mater?Loose CT, circulation of Cerebral Spinal Fluid.
What is Pia Mater?Loose CT, transportation of Blood Vessels.
What is Epidural Space?Space around Spinal Cord filled with semi-liquid fat + venous plexus.
What is Subdural Space?A potential space found only with pathologies.
What is Subarachnoid Space?Space where Cerebral Spinal Fluid can be found.
What are the 3 Main Dural Sacs/Cisternae?Lumbar, Magna, and Interpenduncular.
What anchors the SC to the Coccyx?Filium Terminale- External.
The Epidural Space is a real space for SC, potential space for _________.Brain.
memorize

Section 6

Question Answer
What are the Somatic Plexi ?Cervical- (C1-C4), Brachial- (C5-T1), Lumbar- (T12-L4), Sacral- (L4-S4).
What is the classification of Autonomic that is Sympathetic NS?Pre-Vertebral.
What is the classification of Autonomic that is Parasympathetic NS ?Visceral.
What is the classification of the Enteric Plexi?Submucosal- *Meissners*- Glands. + Myentric- *Auerbach*- Intestines.
memorize

Section 7

Question Answer
What is a Dermatome?An area of skin sensitized by spinal nerve or segment.
What is a Myotome?A muscle or muscle group innervated by spinal nerve or segment.
What is a Sclerotome?A bone or ligament supplied by a spinal nerve or segment.
In reference to Somites, is Sclerotome more medial to the future SC, or Dermato-myotome?Sclerotomes are more medial, while the Dermato-myotome is more external.
memorize

Section 8

Question Answer
What dermatome supplies the Posterior Skull?C2
What dermatome supplies the Pinkie Finger?C8
What dermatome supplies the Ant Pubic Region?L1
What dermatome supplies the Med Aspect of Forearm?T1
What dermatome supplies the Lat Aspect of Arm?C5
What dermatome supplies the Scalp/ Eyebrow Region?V1- Opthalmic
What dermatome supplies the Undereye to Upperlip Region>V2- Maxillary
What dermatome supplies the Armpit?T2
What dermatome supplies the Ant Aspect of Palm?C7
What dermatome supplies the Jaw + Ears?V3- Mandibular
What dermatome supplies the Clavicle?C4
What dermatome supplies the Nipple Region?T4
What dermatome supplies the Xiphoid Process?T6
What dermatome supplies the Belly Button Region?T10
What dermatome supplies the Cubital Fossa?C6
What dermatome supplies the Acromion?C4
What dermatome supplies the Heel of the foot + Pinkie Toe?S1
What dermatome supplies the Popliteal Fossa?S2
What dermatome supplies the Med aspect of Leg?L4
What dermatome supplies the Lat aspect of Leg?L5
What dermatome supplies Mid Medial Thigh?L3
memorize

Section 9

Question Answer
What Myotomes are responsible for ADD of toes?S2, S3.
What Myotomes are responsible for Flex @ Hip.L1, L2.
What Myotomes are responsible for Plantar Flexion?S1, S2.
What Myotomes are responsible for Ext @ Knee?L3, L4.
What Myotomes are responsible for Flex @ Knee?L5, S2.
What Myotomes are responsible for ABD of Arm ?C5
What Myotomes are responsible for Flexion of Digitis?C8.
What Mytomes are responsible for Flexion of Elbow?C5, C6.
What Myotomes are responsible for ABD + ADD of Digits?T1.
memorize

Section 10

Question Answer
The Stretch Reflex controls what?mm Fibre Length.
The receptor for the Stretch Reflex is ?Muscle Spindle.
The Stretch Reflex is _____synaptic, and _____lateral.Monosynpatic, and ipsilateral.
It is integrated by the _______, and regulated by the _______.Spinal Cord, regulated by the Brain.
It excites the _______ muscles, and suppresses the _______ muscles. (Polysynpatic).Agonsit mm's, and suppresses the antagonist mm's/
memorize

Section 11

Question Answer
The Tendon Reflex controls what?mm Fibre Tension.
The receptor for the Tension Reflex is ?Golgi Tendon Organ.
The Tendon Reflex is ______synaptic, and ______lateral.Polysynpatic and Ipsilateral.
It is integrateed by the _______, and regulated by the _______.Spinal Cord, and regulated by the brain.
It excites the ______ muscles, and suppresses the _____ muscles. Antagonist mm's and suppresses the agonist mm's.
memorize

Section 12

Question Answer
The Flexor/Crossed Extensor Reflexes control what?mm Fibre Length.
The receptor is ______.Derma.
It is integrated by _______, regluated by ________.Spinal cord, regulated by the brain.
It is _______synpatic, and ______segmental.Polysynpatic, and Intersegmental.
Excites the _______ muscles ipsilaterally, and _______ muscles contralaterally.Flexor Muscles Ipsilaterally, Extensor Muscles Contralaterally.
memorize