surface anatomy 3 - Broca's Area Flashcards Preview

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Flashcards in surface anatomy 3 - Broca's Area Deck (19)
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1
Q

What does operculum cover?

A

Insula

2
Q

What is Broca’s speech area?

A

Larger in volume than its homologue in the right hemisphere

3
Q

what are the 2 evidence for broca speech area being larger in volume?

A
  1. Cytoarchitectonic analysis of area 44 and area 45 in 10 human brains
  2. Post-mortem study of the Inferior frontal gyrus in 12 human brains
4
Q

What is the basis of hemispheric dominance for language?

A

Structural asymmetry

5
Q

What was Broca’s description of neuroanatomical correlate of language expression based on?

A

Visual assessment of external convexity of the brain

6
Q

What was the famous model of Broca?

A
  1. Left cerebral hemisphere dominant for language

2. Posterior regions of left third frontal convolution for expression of language

7
Q

What become known as the Broca’s area

A

Circumscribed region on posterior left third frontal convolution

8
Q

What are the various macroscopic definitions of Broca’s area from anterior to posterior?

A

(A) traditional Pars opercularis, bound caudally by the ipcs and rostrally by the anterior ascending ramus of the Sylvian fissure

(B) traditional Pars opercularis (ipcs-ar) and Pars triangularis (ar-hr) measured in unison

(C) Entire inferior frontal gyrus, bound caudally by the ipcs and rostro-ventrally by the los, which has been measured in total with subsequent separation into the Pars opercularis (ipcs-ar), Pars triangularis (ar-hr), pars orbitalis (hr-los), triangularis caudalis (ar-ts) and triangularis rostralis (ts-hr)

(D) Pars opercularis extending caudally into the precentral gyrus by using the ass as the posterior border

(E-F): ar-hr and pars opercularis and posterior half of ipcs-ts measured in unison

9
Q

What did Amunts et al do?

A

Work on cytoarchitectonic field = modern computing method

10
Q

What is the cytoarchitectonic field?

A

Where language is presented

11
Q

Areas causing Broca’s Aphasia

A

Male who had severe disturbance in spoken language

patient referred to as Tan developped unilateral paralysis of lower right extremity

12
Q

What is Motor Phasia not only caused by?

A

Lesion in inferior frontal gyrus but different areas can produce motor phasia

13
Q

What are the features of Broca’s area?

A
  1. Defined anatomically PO
  2. Variable cytoarchitectonic field
  3. Poor relationship with Broca’s aphasia
14
Q

What are the recognition system for Broca’s area?

A

Axial

Sagittal

15
Q

What are examples of axial recognition system?

A
  1. Knob
  2. SFS-PreCS opposite to knob
  3. Pars Bracket
  4. PreCG > PoCG
16
Q

What are example of Sagittal recognition system?

A
  1. Ant Asc-Horiz Ramus
  2. Hook
  3. Pars Bracket
17
Q

What is PACS?

A

Picture archiving communication system

18
Q

What comes below the sylvian fissure?

A

Superior temporal gyrus

19
Q

What tissue connects the precentral with postcentral gyrus inferiorly?

A

Subcentral Gyrus