12 USMLE Neurology, Psychiatry and Anatomy Quick Review Questions with Answers (Set 2)

These 12 quick USMLE review questions test high-yield facts that show up again and again on the exam: body dysmorphic disorder, spermatogenesis, juvenile angiofibroma, backpack injuries, Huntington disease, shoulder abduction, the scrotum, embryology, the pituitary, the blood-brain barrier, PCP and esophageal control. Each question includes the correct answer.

Written by Dr. Ray Makar, MD, author of the Repeated USMLE Questions eBook series.

Prefer video? Watch daily USMLE case questions on MedFocus by Dr. Ray on YouTube.

How to use this page: read the question, pick your answer, then tap Show Answer and Explanation.

Questions

Question 1. Which of the following disorders is most likely related to body dysmorphic disorder?

A- Generalized anxiety disorder
B- Malingering
C- Obsessive compulsive disorder
D- Post-traumatic stress disorder

C- Obsessive compulsive disorder- Body Dysmorphic Disorder (BDD) is closely related to Obsessive-Compulsive Disorder (OCD) because both disorders involve intrusive, distressing thoughts and repetitive behaviors aimed at reducing anxiety. Individuals with BDD become preoccupied with perceived flaws in their physical appearance, which may lead to compulsive behaviors such as mirror-checking, excessive grooming, or seeking reassurance.
The correct answer is C

 

Question 2. During spermatogenesis, which type of cells enter meiosis 1 to form primary spermatocytes?

A- Primordial germ cells
B- Spermatids
C- Type A spermatogonia
D- Type B spermatogonia

D- Type B spermatogonia- Type B spermatogonia differentiate and enter meiosis I to become primary spermatocytes. Primordial germ cells and spermatids are earlier and later stages, respectively, and type A spermatogonia function mainly as stem cells for renewal.
The correct answer is D

 

Question 3. Which of the following is the most common cause of nasal obstruction and bleeding in adolescents?

A- Angiofibroma
B- Nasal cancer
C- Nasal polyps
D- Papilloma

A- Angiofibroma: Juvenile angiofibroma is the most common vascular tumor in teenage boys and young adults.
The correct answer is A

 

Question 4. What is the most common injury resulting from wearing a heavy backpack for a long time?

A- Costoclavicular syndrome
B- Frozen shoulder
C- Rotator cuff injury
D- Shoulder dislocation

A- Costoclavicular syndrome: Wearing a backpack for a long time leads to compression of subclavian vein and artery causing cyanosis, pain and paresthesia.
The correct answer is A

 

Question 5. Which of the following regions of the brain is most likely affected in patients with Huntington’s disease?

A- Anterior frontal lobe
B- Caudate nucleus
C- Substantia nigra
D- Temporal lobe

B- Caudate nucleus- Huntington’s disease is characterized by degeneration and atrophy of the caudate nucleus, leading to chorea, psychiatric changes, and cognitive decline.
The correct answer is B

 

Question 6. Which of the following muscles are responsible for primary abduction of the arm at the shoulder joint?

A- Coracobrachialis and deltoid
B- Deltoid and infraspinatus
C- Deltoid and supraspinatus
D- Supraspinatus and infraspinatus

C- Deltoid and supraspinatus- These are the primary adductors of shoulder joint.
The correct answer is C

 

Question 7. Which of the following is responsible for the wrinkled appearance of the scrotum?

A- Dartos fascia
B- Pampiniform plexus
C- Thickened keratinized epithelium
D- Tunica albuginea

A- Dartos fascia- It is the reason of pigmented, wrinkled appearance of the scrotum. Other options are far wrong.
The correct answer is A

 

Question 8. The tracheal tube is originated from which of the following structures?

A- Ductus arteriosus
B- Foregut
C- Fourth pharyngeal arch
D- Third pharyngeal arch

B- Foregut- Trachea and lungs are originated from invagination in the foregut
The correct answer is B

 

Question 9. The anterior pituitary is derived from which of the following structures?

A- Infundibulum
B- Neurohypophysis
C- Rathke’s pouch
D- Third pharyngeal arch

C- Rathke’s pouch- Posterior pituitary is derived from neurohypophysis.
The correct answer is C

 

Question 10. Which of the following cell types is responsible for forming the blood brain barrier (BBB)?

A- Astrocytes
B- Microglia
C- Oligodendrocytes
D- Schwann cells

A- Astrocytes- Microglia mediates immune response, Oligodendrocytes produce myelin in the CNS and SC produce myelin in peripheral NS.
The correct answer is A

 

Question 11. A 15-year-old male is brought to the emergency department for ataxia, hyperactivity, hallucinations, abusive language and nystagmus. Which of the following is most likely responsible for his condition?

A- Amphetamines
B- Barbiturates
C- Cocaine
D- Phencyclidine (PCP)

D- Phencyclidine (PCP)- It is the only drug on the list that can use these clinical features.
The correct answer is D

 

Question 12. Regulation of which of the following regions is mostly dependent on extrinsic nerves?

A- Large intestine
B- Lower esophagus
C- Small intestine
D- Upper esophagus

D- Upper esophagus- This region is the only one listed that has no intrinsic activity and composed of striated muscles so, it is dependent on extrinsic nerve supply.
The correct answer is D

 

High-yield points from this set

  • Body dysmorphic disorder is in the obsessive-compulsive spectrum.
  • Huntington disease affects the caudate nucleus.
  • The anterior pituitary comes from Rathke’s pouch.
  • Astrocytes form part of the blood-brain barrier.

Keep practicing

Leave a Comment