Right Hemisphere Overview Flashcards
What are the right hemisphere functions?
-Arousal, orientation, vigilance and selective attention
-Visual perception: holistic gestault-like stimuli, geometric and spatial information,
facial recognition, body image
-Emotional experience and expressions:angry and happy emotions
-Perception of temporal order
-Perception of musical harmony
Other aspects of communication
Aspects of communication
Discourse comprehension and production
Complex inferences implied in verbal
Communicative efficiency and specificity
Understanding alternative/ambiguous meanings
Understanding and expressing emotional tone
Understanding and expressing prosodic aspects
R Hemi may be less efficient at understanding __ than___
verbs than nouns
Brain location for understanding and expressing prosodic aspects
R inferior frontal gyrus
R posterior temporo-parietal
region for understanding
prosody
Pragmatic communication skills:
turn-taking,
topic maintenance,
social appropriateness,
eye contact
Neuropathology: Etiologies
CVA
Tumors
Head Trauma
Alzheimer’s, Parkinson’s, other neurological diseases
Sites of lesions
basal ganglia-13.8% (highest)
frontal - 10.8%
parietal - 10.8%
Damage to any lobe in either hemisphere can lead to
neglect
Left brain damage: right-neglect =
2-15%
Right brain damage: left-neglect =
31-90%
right brain damage with left neglect is..
More severe and consistent, resistant to therapy
Characteristics of Left-neglect:
Right focus, don’t notice left
Difficulty shifting attention from right to left
Failure to perceive left-sided tactile or perceptual stimuli
Failure to copy the left side of a picture of design
Painting only right half of a face-ignore left
Extreme right-centered attention to an array of stimuli
Paying attention only to the right side of a space described from memory
Bumping into things on the left
Using only right-sided objects
Disownership of the left side of the body
Denying illness (anosagnosia)
Auditory neglect
Motor neglect
Left-neglect in reading
Left neglect in writing
Facial Recognition AKA
Prosopagnosia
Facial Recognition deficits
Difficulty recognizing familiar faces
Difficulty choosing pictures of faces just shown
Problems naming the pictures of faces of famous persons
Capgras syndrome:
delusional belief that their friends and family members are not their real selves but imposters or doubles.
Achromatopsia:
loss of color vision
Simultanagnosia:
inability to perceive simultaneously the multiple details of a visual display.
Pallinopsia:
variant of hallucination, major feature is abnormal persistence or recurrence of visual images after the stimulus has been removed.
Attentional Deficits
- Reduced state of arousal
- Difficulty in sustaining attention
- Difficulty in paying selective attention
- Disorientation
Disorientation:
3 types?
Topographic disorientation
Geographic disorientation
Reduplicative paramnesia (rare condition)-belief in the existence of multiple and identical persons, places and body parts
Affect
Behavioral expressions of emotional states or experiences
Affective Deficits
- Difficulty understanding emotions
- Difficulty stating the emotions depicted in pictures stories
- Problems recognizing emotions in sentences
- Problems understanding emotional tone of voice
- Difficulty in emotional expressions
Prosody is?
stress patterns, intonation rhythm, and melodious qualities of speech that convey meaning.
Prosodic Deficits
- Monotonous
- Impaired stress patterns
- Reduced rate
- Devoid of emotion
- Impaired in prosodic comprehension
Discourse means?
social communication skills, involves descriptions of events, objects, and performance, extended talk on a given topic, conversations.
Discoure deficits with RHD
- Distinguishing significant from irrelevant info.
- Use tangential, inconsequential aspects of topics
- Conversational speech-irrelevant or tangential
- Understanding implied meanings, abstract words, metaphors, irony, and humor
- Premature incorrect inferences (jumping to conclusions)
- Confabulation and excessive speech
- Unelaborated narratives
Semantic Problems
- Difficulty with implied, alternative or abstract meanings
- Failure to grasp overall meaning
- Difficulty with proverbs, idioms, metaphors
- Problems with abstract categories
- Difficulty with irony, humor, sarcasm
- Problems with logical errors in sentences
Pragmatic Deficits
- Turn-Taking
- Topic maintenance
- Maintaining eye contact
- Insensitivity to communicative context
Prosody includes what aspects?
Stress patterns
Intonation
Rhythm
Melodious qualities that convey meaning
Prosodic Deficits (More?)
- Speech sounds monotonous
- Lacks variation
- Missing subtle extralinguistic meanings
- Connotations emotional tone
Prosodic deficits AKA
aprosodia, auditory affective agnosia, dysprosodia
Perimetry Plots
A. Normal vision in darker areas
Right Hemonimous Hemianopsia blindness in darker areas
Bilateral hemianopsia (tunnel vision)- blindness in darker areas
Lesion in:
1 Optic nerve:
2Optic Chiasm:
3 Posterior Optic chiasm:
- blindness
- both lateral fields (bilateral hemianopia)
- 1/2 of each eye (homonymous hemianopia or hemianopsia)
