Exam 2 Patho Flashcards
Motor Neurons (Efferent)
Carries signals AWAY from the brain and spinal cord to target the body to regulate activity.
Sensory Neurons (Afferent)
Carries impulses from receptors and the peripheral to the nervous system (brain and spine)
Interneurons
Most abundant neuron type.
-Provides connection between afferent and efferent neurons.
Two types of Nociceptive Pain
Somatic = Skin Joints, muscles, and bones
Visceral= Hollow Organs
Two types of Nociceptive Pain
Somatic = Skin Joints, muscles, and bones
Visceral= Hollow Organs
Neuropathic Pain aka
Neurogenic
Pain within the CNS
Nociceptive Pain is induced by
Inflammation or tissue injury.
nociceptive pain can be found in
skin, joints, muscles, bones, and other internal organs
Process of Nociception
transduction (stimuli), transmission (signal moves to CNS and back to site), modulation (slows release of neurotransmitters), and perception (response to pain)
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Gate Control Pain Theory
a mechanism, in the spinal cord, in which pain signals can be sent up to the brain to be processed to accentuate the possible perceived pain, or attenuate it at the spinal cord itself. The ‘gate’ is the mechanism where pain signals can be let through or restricted.
Chronic Pain
Pain the lasts up to 3 months
Acute pain
Pain that happens suddenly.
Phantom Pain
Pain felt on limb that is not longer attached
Referred pain
pain felt in a different part of the body.
Decerebrate Posturing
Caused by damage to deeper brain structures, pons, and diencephalons.
This type of posturing usually means there has been severe damage to the brain.
Decorticate Posture
damage to both hemispheres of the cerebral cortex, specifically internal capsules.
- Better survival rates, usually affects one side of the body.
Decerebrate Posture Photo
an abnormal body posture that involves the arms and legs being held straight out, the toes being pointed downward, and the head and neck being arched backward. The muscles are tightened and held rigidly.
Decorticate Posture Photo
an abnormal posturing in which a person is stiff with bent arms, clenched fists, and legs held out straight.
Central Nerve 1
Olfactory Nerve
-sense of smell
Cranial Nerve 2
Optic Nerve
-Eyes
Cranial Nerve 3
Ocular Motor
- Movement of the eyes
Babinski Reflex
occurs after the sole of the foot has been firmly stroked. The big toe then moves upward or toward the top surface of the foot. The other toes fan out. This reflex is normal in children up to 2 years old. It disappears as the child gets older.
- Adults who still have it have some type of brain damage.
Patho of Alzheimer’s
-senile plaques form in the hippocampus and cerebral cortex and impact memory and decision-making.
-characterized by an accumulation of abnormal neuritic plaques and neurofibrillary tangles. Plaques are spherical microscopic lesions that have a core of extracellular amyloid beta-peptide surrounded by enlarged axonal
Patho of Spina Bifida
caused by the maldevelopment of the ectodermal, mesodermal, and neuroectodermal tissues. The spina bifida is a congenital anomaly that arises from the incomplete development of the neural tube. It is commonly used as a nonspecific term referring to any degree of neural tube closure.