Pathology Chapter 6 Flashcards
What two systems help maintain homeostasis?
Endocrine and nervous system
Three basic functions the nervous system is grouped in are?
Sensory Function
Integrative Function
Motor Function
What makes up the Central Nervous System (CNS)?
Spinal cord and brain
What are the four major parts the brain consists of?
Cerebrum
Diencephalon
Cerebellum
Brain stem
Explain the cerebrum
Its the largest part of the brain.
Is where the sensations such as vision, smell, taste and body movements are consciously perceived.
Where skeletal muscle motor movements are initiated.
Where emotional and intellectual processes occur.
Decisions are made.
Explain the diencephalon
In the center of the brain.
Two main parts are thalamus and hypothalamus.
It regulates and integrates the autonomic nervous system and pituitary glands.
Controls behavioral patterns, persons 24 hr cycle called circadian or biorhythms.
Controls body temp, sleep patterns and maintains consciousness.
Explain the cerebellum
Consists of two connected lobes on the posterior and inferior part of the brain and helps coordinate complex movements and regulates posture and balance.
Explain the brain stem
Has 3 main divisions: medulla oblongata, conducts sensory and motor impulses.
Contains vital centers that regulate heartbeat, breathing, blood vessels diameter, swallowing, vomiting, coughing and sneezing.
How cranial nerves are there?
12
How many spinal nerves are there?
31 pairs
What is the nickname for the parasympathetic division?
Rest and digest division
Name the sections of the neurological pathologies
CNS disorders Infectious diseases Neurodegenerative diseases Neurovascular disorders PNS disorders
CNS disorders include
Spina bifida Cerebral palsy Attention deficit-hyperactivity disorder Autism Seizure disorders Spinal cord injury Brain tumors Anxiety disorders Types of depression
A group of congenital neural tube defects characterized by failure of the posterior spinous processes of the vertebral column to close
Spina bifida
Types of spina bifida
Spina bifida occult’s
Meningocele
Myelomeningocele
Etiology of spina bifida
The reason that the neural tube fails to close during embryonic life is unknown but maternal folic acid deficiency and genetic alterations are commonly associated with the defect.
A group of motor disorders caused by brain damage that occurred during fetal life, birth or early childhood
Cerebral palsy
Etiology of cerebral palsy
Is caused by inadequate blood flow or reduced oxygen supply to the brain
A neurological disorder in which the affected person displays behaviors associated with the inattentiveness, hyperactivity, impulsivity or a combination of these.
Attention deficit-hyperactivity disorder (ADD)
Etiology of ADHD
Is unknown
A condition present in early childhood characterized by difficulty communication and forming relationships
Autism
Most common and mild form of autism
Asperger syndrome
Etiology of Autism
Appears to be abnormal brain chemistry but the cause of the abnormality is unclear
Characterized by explosive episodes of uncontrolled and excessive electrical activity in the brain that result in a sudden change in behavior. Also described as lightning storm in the brain
Seizure disorders (epilepsy)
Etiology of seizures
Cause is unknown
Types of seizures
Partial seizure
Absence seizure
Tonic-clinic seizure
Clinic phase
May be associated with repeated nonpurposeful movements such as turning the head from side to side, lip smacking, leg twitching and picking at clothing or with sensations such as ringing in the ears, sensations of light or tingling that begins in one area and spreads
Partial seizure
Seizure accompanied by transient facial movements
Absence seizures
Most intense seizures. General tone increases and muscular contractions begin
Tonic-clonic seizures
The classic presentation of alternating contraction and relaxation of muscles
Clonic phase
Occurs from direct injury to the spinal cord or indirectly from damage to surrounding bones, tissues or blood vessels
Spinal cord injury
Etiology of spinal cord injury
Most often caused by trauma
Are malignancies that arise from any structures of the brain and include neurons, neuralgia, blood vessels or meninges as well as from the pituitary and pineal gland
Brain tumors