Depression is the most prevalent mental disorders in adults with 2-5% of the population being affected, and 1-2% of the older population affected. Luckily is one the more treatable mental diseases and if identified properly and early enough it can prevent other serious illnesses from arising.
Symptoms and characteristics: 1.
Dysphoria- the general feeling of feeling down or blue
2. Physical symptoms- can include insomnia, changes in appetite, headaches, trouble breathing, fatigue, loss of concentration
(*Note*)These symptoms should be carefully evaluated as they can also be signs of other disorders
3. The problems must last at least 2 weeks
4. Other causes such as medication, alcoholism, neurological, etc. must be ruled out
5. These symptoms must negatively affect the persons daily living
Here is a good resource to read if you think you or a friend may be experiencing any of these symptoms clickyFactors that increase risk for depression: 1. Being female, unmarried or widowed, experiencing stressful life situations, and lacking social support.
2. Having a chronic illness, living in a nursing home, or being a caregiver for someone
3. Ethnicity also affects depression. Hispanics have an overall high rate of depression compared to other ethnicities
Gender and Depressive Symptoms: 1. Women are diagnosed with depression more often than men
2.
Depletion syndrome of the elderly - A form of depression in older women in which dysphoria and self blame are usually not present
Assessment scales: 1.
Beck Depression Inventory - this test is often used on adults that has questions pertaining to overall feelings and physical symptoms
2.
Geriatric Depression Scale - physical symptoms have been removed and the format is easier for older adults
(*Note*)A diagnosis of depression should never be based solely a test score alone
Here is links for more information on the BDI and GDS
BDI:
BDI GDS:
GDSCauses of Depression: 1. biological-physiological theories- Focus on genetic predispositions and changes in neurotransmitters
2. psychosocial theories
i. Behavorial theories- argue that depressed people do less pleasurable activities and receive less pleasure from those activities
ii. Behavorial-cognitive theories- focuses on internal belief systems which people interpret as uncontrollable
iii. Another psychosocial theory argues that it is a balance between biological dispositions, stress, and protective factors
Treatment of Depression: 1. Drug Therapies
i.
SSRI's (Selective Serotonin Reuptake Inhibitors)-boosts levels of serotonin and generally have lower side effects
ii.
HCA's (Heterocyclic Antidepressants)- includes common tricyclic antidepressants and are effective in at least 70% of people, but have a rate of side effects esp. in older adults who are taking other medications
iii.
MAO inhibitors (Monoamine Oxidase Inhibitors)- interfere with transmissions between neurons, but can produce deadly side effects when they interact with food that contains tryamine or dopamine (i.e. cheddar cheese, wine, chicken liver)
iv.
Lithium- used for bipolar disorder, which involves mood swings between mania (extremely high activity) and depression
Here is a good cite for information on these and other Antidepressant medications medicinenet 2.
Electroconvulsive therapy (ECT)- Used for treating very severe forms of depression that do not respond to medication
3. Psychotherapy- based on the idea that talking to a therapist about one's problems can help; there are over 100 types of psychotherapy
i. behavioral therapy- focuses on changing current behavior without focusing on the underlying causes
ii. cognitive therapy- focuses on changing how people think
Delirium: characterized by disturbances of consciousness and changes in cognition that develop over a short period of time
i. Caused by a number of medical conditions, medication side effects, substance intoxication or withdrawl, exposure to toxins, or some combination of the above
ii. The most important aspect in diagnosis of this disease is to differentiate between it and depression and dementia
iii. Most cases of delirium can be cured
Dementia: is a not a single disease but is instead a cluster of conditions.
i. About 4 million people, 6-8% of adults over 65 have dementia
1. At the age of 65 the rate is less than 1%, but for those over 85 the rate increase to about 50%
ii.
The families of dementia 1.
Dementia can literally mean losing one's mind, and is characterized by cognitive and behavioral deficits involving some form of permanent brain damage
iii.
Alzheimer's Disease: is the most common form of progressive, degenerative, and fatal dementia accounting for as much as 70% of dementia cases
1. Neurological changes in Alzheimer's disease
1. The changes in the brain are microscopic and, thus it can only be definitively diagnosed at autopsy
i. Rapid cell death- occurs in the hippocampus (the part of the brain involved in memory), the cortex (the part of the brain involved in higher level cognitive abilities), and the basal forebrain (the lower portion of the front of the brain)
ii. Neurofibrillary tangles- accumulations of pairs of filaments in the neuron that become wrapped around each other
iii. Neurotic plaques- are spherical structures consisting of a core of beta-amyloid surrounded by degenerated fragments of dying or dead neurons
Here is an interesting article on how fast neurotic plaques and Alzheimer type neuronal changes can arise Science Daily iv. Decreases in certain neurochemicals may also be a possible cause of Alzheimer's disease