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Anatomy and Physiology
Nervous System
82
Anatomy
Undergraduate 1
09/10/2017

Additional Anatomy Flashcards

 


 

Cards

Term
What is the pineal gland important for?
Definition
Melatonin production & Biological clock
Term

Which lobes of the cerebral cortex are involved in language function?

Definition
Frontal, Parietal, Temporal
Term

Which lobe of the cerebral cortex is important for memory function?

Definition
Limbic
Term

What are the two major divisions of the central nervous system?

Definition

Central Nervous System (CNS)

 

and

 

Peripheral Nervous System (PNS)

Term

Understand the meninges and spaces that exist between and around the meninges?

Definition

meninges: dura mater / arachnoid mater / pia mater

 

spaces: epidural / subdural / subarachnoid 

Term

Where are non-vital reflexes located in the brain?

Definition
Brainstem
Term

Understand the structures and functions of the diencephalon?

Definition
located between cerebrum & midbrain
Term

How many lobes are in the cerebral hemisphere?

Definition
6 (six)
Term

What does the nervous system and central nervous system consist of?

Definition

NS = Brain, Spinal Cord, Nerves

 

CNS = Brain, Spinal Cord

Term

What are sulci?

Definition
shallow groves in brain
Term

What is the largest part of the brain?

Definition
Cerebrum
Term

Understand sensory neurons?

Definition
afferent - conduct impulses to spinal cord or brain
Term

How many ventricles are in the brain and where are they?

Definition

Four - #1 & 2 are lateral in each hemisphere

#3 is below and medial to 1 & 2

#4 - diamond-shaped space where cerebellum attaches to brain stem

Term

How is cerebrospinal fluid formed?

Definition
Spearation of flud from blood and choroid plexuses
Term

What structures are included in the brainstem?

Definition
Midbrain, Pons, Medulla
Term

What part of the brain releases melatonin?

Definition
Pineal Gland
Term

Understand the limbic system?

Definition
Controls emotions, such as happiness, sadness & love
Term
Autonomic Nervous System has two divisons.  Name them?
Definition
Sympathetic & Parasympathetic
Term
Sympathetic division is involved with:
Definition

Prepareing the body to deal with immediate threats.

Fight or flight response

Term
Parasympathetic division coordinates the body's normal resting activities.  Also called:  ?
Definition
rest & repair
Term
What is an Axon?
Definition
a single process extending from the axon hillock
Term
What is the mylein sheath?
Definition
fatty layer covering the axon
Term

Dura mater - strong, white, fibrous tissue.

Outer layer of meninges.

 

Also known as:  ?

Definition
Tough Mother
Term
Where is the arachnoid mater located?
Definition

between the dura mater and pia mater

 

(delicate, cobweblike layer)

Term
Pia mater is the innermost, transparent layer that adheres to....???
Definition

The outer surface of the brain and spinal cord.

 

Also, contains blood vessels.

Term
Pia mater is also called....?
Definition
Tender mother
Term
Which space of the meninges contains a significant amount of CSF (cerebrospinal fluid)?
Definition

Subarachnoid

 

(space for Lumbar punctures)

Term

True or False....

The spinal cord completely fills the spinal cavity in the vertebrae.

Definition
False
Term
Fibers of dorsal nerve root carry sensory info  (into or out) the spinal cord.
Definition
into
Term
Fibers of ventral nerve root carry sensory info  (into or out) the spinal cord.
Definition
out
Term
What parts make up the brain stem?
Definition

medulla oblongata

pons

midbrain

Term
What is the second largest part of the brain?
Definition
Cerebellum
Term
Which part of the brain contains the most neurons?
Definition
Cerebellum
Term
Which part of the brain is the largest?
Definition
Cerebrum
Term
What are the executive functions of the Frontal lobe?
Definition
Thinking, planning, problem solving, personality
Term
What are the executive functions of the Parietal lobe?
Definition
Perception, math, spelling, making sense of the world
Term
What are the executive functions of the Temporal lobe?
Definition
memory, understanding language
Term
What are the executive functions of the Occipital lobe?
Definition
Vision
Term
What are the executive functions of the Insula (limbic system) lobe?
Definition

emotions and pain

 

(hidden from view - inside the internal brain)

Term
What are fissures?
Definition
deeper grooves that divde each cerebral hemisphere into lobes
Term
How many fissures are prominent in the brain?
Definition
4 (four)
Term
What is the name of the deepest fissure of the brain?
Definition
Longitudinal
Term
What is the name of the fissure betwen the frontal and parietal lobes?
Definition

Central sulcus

 

a.k.a. fissure of Rolando

Term
What is the name of the fissure between the temporal lobe below and parietal lobes above?
Definition

Lateral 

 

a.k.a. fissure of Sylvius

 

also, the island of Reil lies deep in the lateral fissure

Term
What are the four funcions of the cerebral cortex?
Definition

Conscientiousness

Language

Emotions

Memory

Term
What is the function of a Synapses?
Definition
to send electrical impulses to neighboring neurons
Term
What is the function of the Axon?
Definition
to transfer electrical impulse signals from the cell body to the synapse
Term
What is the Soma of a neuron?
Definition
the cell body which contains most of the cell's organelles
Term
Where is the DNA contained in a neuron?
Definition
in the nucleus
Term
What is the function of the dendrites in a neuron?
Definition
to receive electrical impulses from neighboring neurons
Term
Describe the space-charge effect
Definition
As electrons build, their charges begin to oppose the emission of additional electrons, limiting the mA range to 1000-1,200
Term
What is the atomic # of tungsten?
Definition

74

Symbol of "W"

Term
What is the only part of the anode or cathode assembly that is located outside the vacuum of the glass envelope?
Definition
The Stator
Term
According to the NCRP, what is the maximum allowable radiation leakage from the tube?
Definition

Must not exceed 100 mR/hr

(at 1 meter from the tube)

Term
What is the primary purpose of the tube glass housing?
Definition

The envelope is the glass housing that protects the tube.

(Also, to provide a vacuum, permitting electrons to flow from cathode to anode without interacting with atoms in air.)

Term
Describe the anode-heel effect
Definition
Due to the geometry of the angled anode target, the radiation intensity is greater on the cathode side.
Term
Describe the Actual Focal Spot (AFS)
Definition
The physical area on the focal track that is impacted.
Term
Describe the Effective Focal Spot (EFS)
Definition
Area that is projected out of the tube
Term
How does the Line Focus Principle relate to EFS?
Definition

Used to reduce the EFS thus increasing resolution.

** permits the best resolution of detail while permitting as large as actual area as possible.

Term
Describe the focusing cup and what it does.
Definition

Shallow depression in the cathode assembly that houses the filaments - made of nickel.

Operates to narrow or focus the electron cloud during thermionic emission to be directed toward anode

Term
What is responsible for the noise during rotor acceleration?
Definition
Ball bearings inside the cuff of the rotor
Term
Describe what it means when the x-ray tube is gassy.
Definition
During thermionic emission, if vaporization occurs, you end up with a gassy tube which decreases the vacuum inside the glass envelope.
Term
What material commonly makes up the target for mammographic units?
Definition

Molybdenum (atomic # 42)

** because of it's ability to give a more uniform range

of lower energy photons.

Term

What material is used for the anode target area?

Why is it used?

Definition

Tungsten

  1. Higher x-ray production efficiency
  2. Thermal conductivity
  3. High melting point
Term
What happens if the stator malfunctions?
Definition

The rotor will not turn and a spot will melt on the anode.

(picture p. 119)

Term
What happens if the rotor malfunctions?
Definition
A malfunctioning bearing can prevent the rotor from turning and produce melting in one spot on the anode.
Term
Describe the filament
Definition
A coil of thin tungsten wire set within the focusing cup
Term
Why is the filament made of tungsten?
Definition
  1. High atomic # of 74 - has higher x-ray production efficiency
  2. Thermal conductivity
  3. High melting point
Term
Is the Cathode side of the tube negative or positive?
Definition
Negative
Term
Is the anode side of an x-ray tube negative or positive?
Definition
Positive
Term

Why is a rotating anode more desirable

than a stationary anode?

Definition

There is better heat dissipation from the rotating anodes, which permits bombardment of electrons from the filament to a given area in a short amount of time.

Stationary anodes are low-power and inefficient for heat dissipation.

Term
What is the Heat Units (HU) formula?
Definition
kVp x mA x time x rectification constant = HU
Term

What are the 4 main components of the

x-ray tube assembly?

Definition
  1. Cathode (the source of electrons)
  2. Anode (target)
  3. Glass envelope (vacuum)
  4. Protective housing (made of very heavy lead)
Term
What 3 things make the Cathode assembly?
Definition
  1. Filament(s)
  2. Focusing cup (located in the filament)
  3. Associated wiring
Term
What 3 things make up the anode assembly?
Definition
  1. Anode
  2. Stator
  3. Rotor
Term
What are the 3 functions of the Anode assembly?
Definition
  1. Serve as target surface for electrons from the filament, eventually becoming the source of x-ray photons
  2. Conducts high-voltage from the cathode back into the generator circuitry
  3. Serves as the primary thermal conductor

** x-ray photons are made at the anode **

Term
List other names for the 'Target Area'
Definition

Target

Focus

Focal point

Focal spot

Focal track

Term
Where do you measure the "source" when measuring for SID?
Definition

Target Area

(portion of the anode where focused electron stream impacts)

Term
Describe Thermionic Emission
Definition
The negative electrode (also called the cathode) is a wire filament that emits electrons when heated. This process is called thermionic emission and the wire filament is called an 'electron gun'.
Term
What are 'Tube Rating Charts'?
Definition
They provide a guide to the maximum technical factors that can be set without overheating the tube.
Term
What is an 'Anode Cooling Chart'?
Definition
Permits calculation of time necessary for anode to cool enough for additional exposures to be made.
Term
Describe 'Off focus radiation'
Definition

Composed of photons that were not

produced at the focal spot.

These photons are produced away from the focal spot and have sufficient

energy that when they strike another object in the tube, they

produce photons and can produce an image.

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