Topic 14 & 15 Parietal lobe lesions

Question 1

Define AgNOSia

Answer 1

Inability to recognize or make sense of incoming sensory information(NOSE)
(R) sided lesion

Question 2

Define AprAXia

Answer 2

Inablity to perform particular purposive actions(motor)
(L) sided lesion

Ideomotor-can’t do task purposefully only automatically

Ideational- Can’t do task on demand or automatically
doesn’t understand the concept

Question 3

Define Aphasia

dysphasia

Answer 3

An impairment of language affecting the production of or the comprehension of speach

(L) sided lesion

Receptive- No understanding spoken or written language. Talkative giberish
Expressive-Cant express verbal or written can’t find right work. Silent
Global

Question 4

Define aNOSOgnosia

Answer 4

NOSO-no sorry i’m fine
Failure to perceive illness , denial of defect or lack of awareness of hemiplegia

(R) sided lesion

Question 5

Compare Anosognosia and Anosdiphoria

Answer 5

Anosognosia
Failure to perceive illness , denial of defect or lack of awareness of hemiplegia

Anosdiphoria
Indifference to or lack of concern about illness or defect

Question 6

Define ASOMATOgnosia

Answer 6

SOMATO - So its my toe???
Patient unaware of/confused about OWNERSHIP of limb
May mistake it for examiners arm
(R) sided lesion
(Somatoparaphrenia)

Question 7

Compare Asomatognosia with Somatoparaphrenia

Answer 7

(R) lesion
Asomatognosia
Patient unaware of/confused about ownership of limb
May mistake it for examiners arm

Somatoparaphrenia
Misidentification of arm involves confabulatory elaboration and may be accompanied by elaborate delusions as to ‘who it belongs to”

Question 8

Define Receptive aphasia

Answer 8

Inability to understand spoken or written language. Difficulty following verbal commands

May have fluent aphasia” can speak fluently but doesnt make any sense”

(L) sided lesion

Question 9

Define Expresive aphasia

Answer 9

Inability to express self using spoken OR written language. May have trouble finding the right word

(L) sided lesion

Question 10

Define

PROsopagnosia

Answer 10

PROSO-profile
Inability to recognise previously familiar faces. Problems discriminating between faces
(R) sided lesion

Question 11

Define

Topographical disorientation

Answer 11

(R) sided lesion

Inability to orient in the environment due to:

• Inability to make use of spacial info
• Inability to perform certain cognitive functions such as forming mental representations of environment
• Perceptual disorders of location and relative position of objects
• Visual agnosia- failure to recognise environmental feaures
• Unilateral neglect

Can give verbal decriptions of familiar route but is unable too execute them by drawing or taking them in real time. Inacuaracy following non verbal maps

Question 12

Define unilateral neglect

Answer 12

Person ingnores sensory information from the ‘left’. Lack of awareness of the left half of their body & left half of the world

Contributing signs:
Attention defecit - sensory innattention
-asomatognosia
- visual innattention
Motor extinction( unilateral hypokinesis)
Anosognosia- unability to perceive illness

Inability to divide attention
Problems moving from automatic attention of stimuli on affected side to new stimuli on that side

Clinical indicators:
Head and gase to the right
lack of attention to left limbs esp upper
Eating half the meal
Shaving 1/2 their face
Failing to negotiate obstacles

(R) sided lesion

Question 13

Constructional apraxia

Define

Answer 13

Poor drawing & constructional abilities
(R) sided lesion

Not a true apraxia

Question 14

Dressing apraxia

Define

Answer 14

Inability to orient clothing to the body in terms of order and spacial awareness

(R) sided lesion
Not a true apraxia

Question 15

List the symptoms that occus with a Left sided Parietal lesion

Answer 15

Left lesion >
Language & motor and Right hemiparesis

Apraxia- no purposive actions
Aphasia-production & comprehension speach
-dyslexia
-Dyscalcula

Lesion to primary somatosensory areas(3,1,2)
Descriminates shape texture or size of objects

Lesion to secondary somatosensory areas(5,7)
Steriognosis and memory of tactile and spacial environment

Lesion to tertiary somatosensory areas(39,40)
Sensory integration and spacial relations, understanding language

Question 16

Define visuospacial perception disorders

Answer 16

Disorder of understanding and conceptualizing visual representations and spacial relationships in learning & performing a task

• depth
• direction
• distance
• motion
• size discrimination
• form perception: ability to perceive the shapes of physical objects and outlines observed in the environment
• Figure ground descrimiation: Trouble distinguishing foreground from background

Question 17

List the symptoms that occus with a RIGHT sided Parietal lesion

Answer 17

Right lesion > Left hemiparesis
Sensory integration, spacial orientation & neglect

Lesion to tertiary somatosensory areas(39,40)

• Agnosia
• Anosognosia (anosdiphoria)
• ASOMATOgnosia(somatoparaphrenia)
• PROSOpagnosia
• Visuospacial perception disorders
• Topographical disorientation
• Unilateral neglect
• Constructional apraxia*
• Dressing apraxia*

Lesion to primary somatosensory areas(3,1,2)
Descriminates shape texture or size of objects

Lesion to secondary somatosensory areas(5,7)
Steriognosis and memory of tactile and spacial environment

Question 18

List symtoms that occur as a result of lesions to secondary cortical areas of the parietal lobe

Answer 18

(5,7)Steriognosis and memory of tactile and spacial environment

• Tactile agnosia( asteriognosis)- Can’t determine object from feel alone
• Visual objecct agnosia- can’t determine objects
• Auditory agnosia- can’t tell if sound is bell or footsteps
• Alexia/Dyslexia
• Colour Agnosia:can’t determine colours

Question 19

Which hemisphere of the brain is known as the dominant hemisphere?

Answer 19

The left hemisphere >It controls language

Right side controls spacial perception
-sensory,integration,neglect