Comprehensive Neuroanatomy and
Endocrine System Practice Exam – Updated
2026 (Graded A+)
Subject: Human Anatomy
Subtopic: Neuroanatomy
Question 1: A patient presents with loss of fine touch and proprioception from the right lower
extremity following a spinal cord hemisection at T10. Which ascending pathway has most likely
been disrupted?
A) Left lateral spinothalamic tract
B) Right dorsal column-medial lemniscal pathway
C) Right spinocerebellar tract exclusively
D) Left corticospinal tract
Correct Answer: B - Right dorsal column-medial lemniscal pathway
Rationale: The dorsal column-medial lemniscal pathway carries discriminative touch, vibration,
and proprioception and ascends ipsilaterally within the spinal cord before decussating in the
medulla. Therefore, a right-sided lesion at T10 produces ipsilateral deficits below the lesion.
Option A carries pain and temperature and would produce contralateral deficits. Option C
contributes to unconscious proprioception but does not fully explain the findings. Option D is a
descending motor tract rather than an ascending sensory pathway.
Question 2: Damage to the precentral gyrus of the cerebral cortex would most directly impair:
A) Auditory processing
B) Voluntary motor initiation
C) Visual interpretation
D) Language comprehension
Correct Answer: B - Voluntary motor initiation
Rationale: The precentral gyrus contains the primary motor cortex responsible for initiating
voluntary skeletal muscle movement. Option A involves the temporal lobe. Option C is
associated with the occipital cortex. Option D primarily involves Wernicke's area in the
dominant temporal lobe.
Question 3: A lesion affecting Broca's area would most likely result in:
A) Fluent but nonsensical speech
B) Inability to understand written language
C) Nonfluent, effortful speech with relatively preserved comprehension
D) Complete loss of memory formation
,Correct Answer: C - Nonfluent, effortful speech with relatively preserved comprehension
Rationale: Broca's area in the dominant frontal lobe governs motor aspects of speech
production. Patients demonstrate expressive aphasia characterized by labored speech but
relatively intact comprehension. Option A describes Wernicke's aphasia. Option B is incomplete
and not characteristic. Option D involves limbic structures such as the hippocampus.
Question 4: Which structure serves as the major relay station for sensory information ascending
to the cerebral cortex?
A) Hypothalamus
B) Thalamus
C) Amygdala
D) Cerebellum
Correct Answer: B - Thalamus
Rationale: The thalamus functions as the principal relay center for nearly all sensory
information destined for the cortex. The hypothalamus primarily regulates autonomic and
endocrine functions. The amygdala processes emotion, and the cerebellum coordinates
movement.
Question 5: Increased cerebrospinal fluid accumulation due to obstruction of the cerebral
aqueduct would most directly enlarge which ventricles?
A) Fourth ventricle only
B) Third and lateral ventricles
C) Lateral ventricles only
D) Fourth and central canal only
Correct Answer: B - Third and lateral ventricles
Rationale: The cerebral aqueduct connects the third and fourth ventricles. Obstruction causes
upstream dilation of the third and lateral ventricles. The fourth ventricle lies distal to the
obstruction and therefore is not enlarged.
Question 6: A patient cannot maintain equilibrium and demonstrates intention tremor. Which
structure is most likely involved?
A) Basal nuclei
B) Cerebellum
C) Hypothalamus
D) Reticular formation
Correct Answer: B - Cerebellum
Rationale: The cerebellum coordinates movement, posture, equilibrium, and motor learning.
Lesions commonly produce ataxia, intention tremor, and disequilibrium. The basal nuclei
regulate movement initiation but do not primarily control balance.
,Question 7: The meningeal layer most closely adherent to the surface of the brain is the:
A) Dura mater
B) Arachnoid mater
C) Pia mater
D) Periosteum
Correct Answer: C - Pia mater
Rationale: The pia mater is a delicate vascular membrane that closely follows gyri and sulci.
The dura is the tough outer covering, whereas the arachnoid lies intermediate to the dura and
pia.
Question 8: Which cranial nerve carries parasympathetic fibers responsible for slowing heart
rate?
A) Trigeminal nerve (CN V)
B) Facial nerve (CN VII)
C) Vagus nerve (CN X)
D) Hypoglossal nerve (CN XII)
Correct Answer: C - Vagus nerve (CN X)
Rationale: The vagus nerve provides extensive parasympathetic innervation to thoracic and
abdominal viscera, including cardiac inhibitory fibers. The other cranial nerves do not
significantly regulate heart rate.
Question 9: Decussation of the majority of corticospinal fibers occurs in the:
A) Midbrain
B) Pons
C) Medullary pyramids
D) Internal capsule
Correct Answer: C - Medullary pyramids
Rationale: Approximately 85-90% of corticospinal fibers cross at the pyramidal decussation in
the caudal medulla. Lesions above this level produce contralateral deficits, whereas lesions
below produce ipsilateral deficits.
Question 10: A patient loses pain and temperature sensation from the left side of the body after a
right-sided spinal cord lesion. Which tract is affected?
A) Right dorsal column
B) Left corticospinal tract
C) Right lateral spinothalamic tract
D) Right vestibulospinal tract
, Correct Answer: C - Right lateral spinothalamic tract
Rationale: Pain and temperature fibers cross near their spinal entry level and ascend
contralaterally in the spinothalamic tract. Thus, a right tract lesion produces left-sided sensory
loss.
Subtopic: Endocrine System
Question 11: A patient with excessive growth hormone secretion after epiphyseal plate closure is
most likely to develop:
A) Pituitary dwarfism
B) Gigantism
C) Acromegaly
D) Cretinism
Correct Answer: C - Acromegaly
Rationale: Growth hormone excess in adults causes acromegaly, characterized by enlargement
of hands, feet, and facial bones. Gigantism occurs before epiphyseal closure. Dwarfism results
from deficiency, whereas cretinism involves thyroid hormone deficiency.
Question 12: Which hormone is secreted by the posterior pituitary rather than synthesized there?
A) Growth hormone
B) Prolactin
C) Antidiuretic hormone
D) Thyroid-stimulating hormone
Correct Answer: C - Antidiuretic hormone
Rationale: ADH is synthesized in hypothalamic nuclei and stored and released by the posterior
pituitary. Growth hormone, prolactin, and TSH are synthesized in the anterior pituitary.
Question 13: Elevated blood glucose stimulates pancreatic beta cells to secrete:
A) Glucagon
B) Somatostatin
C) Insulin
D) Cortisol
Correct Answer: C - Insulin
Rationale: Insulin lowers blood glucose by promoting cellular uptake and glycogen synthesis.
Glucagon raises glucose concentrations, whereas cortisol is an adrenal hormone.
Question 14: Which endocrine gland consists of an outer cortex and inner medulla?
A) Thyroid gland
B) Adrenal gland
Endocrine System Practice Exam – Updated
2026 (Graded A+)
Subject: Human Anatomy
Subtopic: Neuroanatomy
Question 1: A patient presents with loss of fine touch and proprioception from the right lower
extremity following a spinal cord hemisection at T10. Which ascending pathway has most likely
been disrupted?
A) Left lateral spinothalamic tract
B) Right dorsal column-medial lemniscal pathway
C) Right spinocerebellar tract exclusively
D) Left corticospinal tract
Correct Answer: B - Right dorsal column-medial lemniscal pathway
Rationale: The dorsal column-medial lemniscal pathway carries discriminative touch, vibration,
and proprioception and ascends ipsilaterally within the spinal cord before decussating in the
medulla. Therefore, a right-sided lesion at T10 produces ipsilateral deficits below the lesion.
Option A carries pain and temperature and would produce contralateral deficits. Option C
contributes to unconscious proprioception but does not fully explain the findings. Option D is a
descending motor tract rather than an ascending sensory pathway.
Question 2: Damage to the precentral gyrus of the cerebral cortex would most directly impair:
A) Auditory processing
B) Voluntary motor initiation
C) Visual interpretation
D) Language comprehension
Correct Answer: B - Voluntary motor initiation
Rationale: The precentral gyrus contains the primary motor cortex responsible for initiating
voluntary skeletal muscle movement. Option A involves the temporal lobe. Option C is
associated with the occipital cortex. Option D primarily involves Wernicke's area in the
dominant temporal lobe.
Question 3: A lesion affecting Broca's area would most likely result in:
A) Fluent but nonsensical speech
B) Inability to understand written language
C) Nonfluent, effortful speech with relatively preserved comprehension
D) Complete loss of memory formation
,Correct Answer: C - Nonfluent, effortful speech with relatively preserved comprehension
Rationale: Broca's area in the dominant frontal lobe governs motor aspects of speech
production. Patients demonstrate expressive aphasia characterized by labored speech but
relatively intact comprehension. Option A describes Wernicke's aphasia. Option B is incomplete
and not characteristic. Option D involves limbic structures such as the hippocampus.
Question 4: Which structure serves as the major relay station for sensory information ascending
to the cerebral cortex?
A) Hypothalamus
B) Thalamus
C) Amygdala
D) Cerebellum
Correct Answer: B - Thalamus
Rationale: The thalamus functions as the principal relay center for nearly all sensory
information destined for the cortex. The hypothalamus primarily regulates autonomic and
endocrine functions. The amygdala processes emotion, and the cerebellum coordinates
movement.
Question 5: Increased cerebrospinal fluid accumulation due to obstruction of the cerebral
aqueduct would most directly enlarge which ventricles?
A) Fourth ventricle only
B) Third and lateral ventricles
C) Lateral ventricles only
D) Fourth and central canal only
Correct Answer: B - Third and lateral ventricles
Rationale: The cerebral aqueduct connects the third and fourth ventricles. Obstruction causes
upstream dilation of the third and lateral ventricles. The fourth ventricle lies distal to the
obstruction and therefore is not enlarged.
Question 6: A patient cannot maintain equilibrium and demonstrates intention tremor. Which
structure is most likely involved?
A) Basal nuclei
B) Cerebellum
C) Hypothalamus
D) Reticular formation
Correct Answer: B - Cerebellum
Rationale: The cerebellum coordinates movement, posture, equilibrium, and motor learning.
Lesions commonly produce ataxia, intention tremor, and disequilibrium. The basal nuclei
regulate movement initiation but do not primarily control balance.
,Question 7: The meningeal layer most closely adherent to the surface of the brain is the:
A) Dura mater
B) Arachnoid mater
C) Pia mater
D) Periosteum
Correct Answer: C - Pia mater
Rationale: The pia mater is a delicate vascular membrane that closely follows gyri and sulci.
The dura is the tough outer covering, whereas the arachnoid lies intermediate to the dura and
pia.
Question 8: Which cranial nerve carries parasympathetic fibers responsible for slowing heart
rate?
A) Trigeminal nerve (CN V)
B) Facial nerve (CN VII)
C) Vagus nerve (CN X)
D) Hypoglossal nerve (CN XII)
Correct Answer: C - Vagus nerve (CN X)
Rationale: The vagus nerve provides extensive parasympathetic innervation to thoracic and
abdominal viscera, including cardiac inhibitory fibers. The other cranial nerves do not
significantly regulate heart rate.
Question 9: Decussation of the majority of corticospinal fibers occurs in the:
A) Midbrain
B) Pons
C) Medullary pyramids
D) Internal capsule
Correct Answer: C - Medullary pyramids
Rationale: Approximately 85-90% of corticospinal fibers cross at the pyramidal decussation in
the caudal medulla. Lesions above this level produce contralateral deficits, whereas lesions
below produce ipsilateral deficits.
Question 10: A patient loses pain and temperature sensation from the left side of the body after a
right-sided spinal cord lesion. Which tract is affected?
A) Right dorsal column
B) Left corticospinal tract
C) Right lateral spinothalamic tract
D) Right vestibulospinal tract
, Correct Answer: C - Right lateral spinothalamic tract
Rationale: Pain and temperature fibers cross near their spinal entry level and ascend
contralaterally in the spinothalamic tract. Thus, a right tract lesion produces left-sided sensory
loss.
Subtopic: Endocrine System
Question 11: A patient with excessive growth hormone secretion after epiphyseal plate closure is
most likely to develop:
A) Pituitary dwarfism
B) Gigantism
C) Acromegaly
D) Cretinism
Correct Answer: C - Acromegaly
Rationale: Growth hormone excess in adults causes acromegaly, characterized by enlargement
of hands, feet, and facial bones. Gigantism occurs before epiphyseal closure. Dwarfism results
from deficiency, whereas cretinism involves thyroid hormone deficiency.
Question 12: Which hormone is secreted by the posterior pituitary rather than synthesized there?
A) Growth hormone
B) Prolactin
C) Antidiuretic hormone
D) Thyroid-stimulating hormone
Correct Answer: C - Antidiuretic hormone
Rationale: ADH is synthesized in hypothalamic nuclei and stored and released by the posterior
pituitary. Growth hormone, prolactin, and TSH are synthesized in the anterior pituitary.
Question 13: Elevated blood glucose stimulates pancreatic beta cells to secrete:
A) Glucagon
B) Somatostatin
C) Insulin
D) Cortisol
Correct Answer: C - Insulin
Rationale: Insulin lowers blood glucose by promoting cellular uptake and glycogen synthesis.
Glucagon raises glucose concentrations, whereas cortisol is an adrenal hormone.
Question 14: Which endocrine gland consists of an outer cortex and inner medulla?
A) Thyroid gland
B) Adrenal gland
