Frontal Lobe Flashcards

Examine frontal lobe anatomy, including its gyri, sulci, motor areas, prefrontal cortex, language regions, and vascular supply.

Card 1 of 30Question

Where is the frontal lobe located?

In the anterior part of each cerebral hemisphere, anterior to the central sulcus and superior to the lateral sulcus.

In This Section

1. Where is the frontal lobe located?

In the anterior part of each cerebral hemisphere, anterior to the central sulcus and superior to the lateral sulcus.

2. Which sulcus separates the frontal lobe from the parietal lobe?

The central sulcus, also called the sulcus of Rolando.

3. Which sulcus separates the frontal lobe from the temporal lobe?

The lateral sulcus, also called the Sylvian fissure.

4. What are the four major gyri on the lateral surface of the frontal lobe?

The precentral, superior frontal, middle frontal, and inferior frontal gyri.

5. Which sulcus separates the precentral gyrus from the more anterior frontal gyri?

The precentral sulcus.

6. Which two sulci divide the frontal cortex into superior, middle, and inferior frontal gyri?

The superior frontal sulcus and inferior frontal sulcus.

7. Which three parts form the inferior frontal gyrus?

The pars opercularis, pars triangularis, and pars orbitalis.

8. Which gyrus contains the primary motor cortex?

The precentral gyrus and its continuation onto the anterior part of the paracentral lobule.

9. Which Brodmann area corresponds to the primary motor cortex?

Brodmann area 4.

10. What is the principal function of the primary motor cortex?

Generating descending motor commands for voluntary movement, especially precise movements of the contralateral body.

11. Where are the lower limb muscles represented in the primary motor cortex?

On the medial surface of the hemisphere, primarily in the anterior paracentral lobule.

12. Where are the face and tongue represented in the primary motor cortex?

In the inferolateral portion of the precentral gyrus.

13. What is the motor homunculus?

A somatotopic representation of body regions across the primary motor cortex.

14. Where is the premotor cortex located?

Primarily in the lateral frontal cortex immediately anterior to the primary motor cortex.

15. What is the principal function of the premotor cortex?

Planning and selecting movements, particularly those guided by external sensory information.

16. Where is the supplementary motor area located?

On the medial surface of the superior frontal gyrus, anterior to the primary motor cortex.

17. What is an important function of the supplementary motor area?

Planning internally generated movement sequences and coordinating complex movements.

18. Where is the frontal eye field located?

In the posterior middle frontal region, commonly associated with Brodmann area 8.

19. What is the principal function of the frontal eye field?

Controlling voluntary saccadic eye movements, particularly toward the contralateral side.

20. Where is Broca's area typically located?

In the pars opercularis and pars triangularis of the inferior frontal gyrus of the language-dominant hemisphere.

21. Which Brodmann areas are traditionally associated with Broca's area?

Brodmann areas 44 and 45.

22. What language impairment is classically associated with damage to Broca's area and its surrounding language network?

Nonfluent aphasia, characterized by effortful speech and impaired grammatical expression.

23. What is the prefrontal cortex?

The anterior frontal cortical region involved in executive, cognitive, emotional, and behavioral regulation.

24. Which prefrontal region is particularly important for working memory and executive control?

The dorsolateral prefrontal cortex.

25. Which prefrontal region is strongly involved in reward evaluation and socially appropriate decision-making?

The orbitofrontal cortex.

26. Which medial frontal region is involved in motivation and valuation during decision-making?

The ventromedial prefrontal cortex.

27. Which major artery supplies most of the lateral frontal cortex?

The middle cerebral artery, particularly its superior division.

28. Which major artery supplies much of the medial frontal cortex?

The anterior cerebral artery.

29. What motor deficit commonly results from a unilateral destructive lesion of the primary motor cortex?

Contralateral weakness, with the affected body regions depending on the lesion location.

30. What behavioral changes may result from extensive bilateral prefrontal cortex damage?

Impaired judgment, reduced initiative, disinhibition, and changes in personality or social behavior.