BM 1041:03 Lecture Notes - Lecture 8: Dural Venous Sinuses, Tentorium Cerebelli, Falx Cerebri

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ambercattle379

23 May 2018

School

James Cook University

Department

Course

BM 1041:03

Professor

alex trollope

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Describe the flow of information within the nervous system from

input to output: stimuli, afferent division/efferent division, CNS/PNS,

somatic/autonomic, motor neurons/sympathetic/parasympathetic,

skeletal/cardiac and smooth muscle

Screen clipping taken: 14/03/2018 11:50 PM

NB: 3rd division of ANS called the enteric/intrinsic nervous system, governs GI system

CNS = brain and spinal cord

Brings info into CNS and sends out responses (efferent)

Has voluntary (skeletal) and involuntary (autonomic) division

Detects stimuli (internal/external)

Controls and coordinates responses

Coordinates activity of other organ systems

Maintains homeostasis

PNS = peripheral nerve fibres, nerve plexuses

Describe the arrangement of the pia, arachnoid and dura mater

within the cranial cavity and in relation to the brain and selected

cranial dural septa

Present in skull, surround the brain

Pia mater (soft)

○

Arachnoid mater

○

Outer periosteal layer - firmly attached to the skull

□

Brain has 2 layers (as opposed to spinal cord)

▪

Dura mater (hard)

○

3 layers (PAD), from inner to outermost

Meninges

L2 - Nervous system 2

Wednesday, 14 March 2018

9:42 PM

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Outer periosteal layer - firmly attached to the skull

□

Inner meningeal layer - close in contact with arachnoid mater beneath

□

Separation of 2 layers to form projections called DURAL SEPTA

▪

Falx cerebri

□

Tentorium cerebelli

□

Flax cerebelli

□

Diaphragma sellae

□

Partitions creates dural venous sinuses - drain blood from skull to veins of head

and neck

▪

Screen clipping taken: 15/03/2018 12:43 AM

Screen clipping taken: 15/03/2018 12:44 AM

Identify the ventricles of the brain (lateral, 3rd and 4th)

Screen clipping taken: 15/03/2018 12:20 AM

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Document Summary

Describe the flow of information within the nervous system from input to output: stimuli, afferent division/efferent division, cns/pns, somatic/autonomic, motor neurons/sympathetic/parasympathetic, skeletal/cardiac and smooth muscle. Nb: 3rd division of ans called the enteric/intrinsic nervous system, governs gi system. Brings info into cns and sends out responses (efferent) Describe the arrangement of the pia, arachnoid and dura mater within the cranial cavity and in relation to the brain and selected cranial dural septa. Brain has 2 layers (as opposed to spinal cord) Outer periosteal layer - firmly attached to the skull. Inner meningeal layer - close in contact with arachnoid mater beneath. Separation of 2 layers to form projections called dural septa. Partitions creates dural venous sinuses - drain blood from skull to veins of head and neck. Identify the ventricles of the brain (lateral, 3rd and 4th) Circulates to the central canal of the spinal cord and the subarachnoid space around outside of the brain.

Related Questions

#1 Visceral sensory information enters the CNS on afferent fibers within

A) dorsal roots S_2 to S_4.

B) dorsal roots T_1 to L_2.

C) cranial nerves V, VII, IX, and X.

D) both B and C

E) A, B, and C

#2 Which of the following is not a function of the neuroglia?

A) support

B) memory

C) phagocytosis

D) secretion of cerebrospinal fluid

E) maintenance of blood-brain barrier

#3 Mary is in an automobile accident and suffers a spinal cord injury. She has lost feeling in her lower

body. Her doctor tells her that swelling is compressing a portion of her spinal cord. Which part of

her cord is likely to be compressed?

A) the anterior gray commissures

B) the anterior white commissures

C) the anterior gray horns

D) ascending tracts

E) descending tracts

#4 The efferent division of the peripheral nervous system innervates:

A) skeletal muscle cells

B) glandular cells

C) smoothmusdecells

D) heart muscle cells

E) all of the above

#5 Cerebrospinal fluid flows within the

A) pia mater.

B) dura mater.

C) filum terminale.

D) arachnoid mater.

E) subarachnoid space.

#6 A patient develops a tumor of a cranial nerve that leads to difficulty in speaking from a loss of

tongue movement.which cranial nerve is affected?

A) glossopharyngeal

B) vagus

C) spinal accessory

D) hypoglossal

E) trigeminal

#7 Parkinson disease is the result of

A) inadequate production of dopamine by substantia nigra neurons.

B) inadequate production of GABA by neurons in the basal nuclei.

C) weak response of the red nuclei of the mesencephalon.

D) decreased levels of acetylcholine from neurons in the substantia nigra.

E) hyperactivity of the limbic system.

#8 Based on the motor homunculus, which of the followingbody regions has the largest motor units?

A) larynx B) hands C) tongue D) face E) back

#9 If the corpus callosum is surgically cu!

A) conscious decisions are made without regard to sensations from the left side.

B) objects toudred by the left hand can be recognized but not verbally identified.

C) symptoms of the "disconnection syndrome" appear.

D) the two cerebral hemispheres operate independently.

E) all of the above

#10 The flexor reflex

A) moves a limb away from a painful stimulus.

B) is an example of a monosynaptic reflex.

C) prevents a musde from generating damaging tension.

D) usually depends on cranial neurons.

E) prevents a muscle from overstretching.

#11 The subdural space lies between

A) the dura mater and the arachnoid mater.

B) the arachnoid mater and the pia mater.

C) the endosteum and the periosteum.

D) the pia mater and the dura mater.

E) the pia mater and the subarachnoid space.

#12 _____ is a condition resulting from an inflammation of a facial nerve.

A) Cerebral palsy

B) Addison disease

C) Bell palsy

D) any of the

#12 Clusters of RER and free ribosomes in neurons are called

A) microglia.

B) neurofilaments.

C) neurofibrils.

D) Nisslbodies.

E) perikaryon.

#1 Visceral sensory information enters the CNIS on afferent fibers within

A) dorsal roots 52 to 54.

B) dorsal roots T1 to L2.

C) cranial nerves V VIL DC and X.

D) bothB and C

E) a, n, and C

#2 Which of the following is not a function of the neuroglia?

A) support

B) memory

C) phagocytosis

D) secretion of cerebrospinal fluid

E) maintenance of blood-brain barrier

#3 Mary is in an automobile accident and suffers a spinal cord injury. She has lost feeling in her lower

body. Her doctor tells her that swelling is compressing a portion of her spinal cord. Which part of

her cord is likely to be compressed?

A) the anterior gray commissures

B) the anterior white commissures

C) the anterior gray horns

D) ascending tracts

E) descending tracts

#4 The efferent division of the peripheral nervous system innervates:

A) skeletal muscle cells

B) glandular cells

C) smoothmusdecells

D) heart muscle cells

E) all of the above

#5 Cerebrospinal fluid flows within the

A) pia mater.

B) dura mater.

C) filum terminale.

D) arachnoid mater.

E) subarachnoid space.

#6 A patient develops a tumor of a cranial nerve that leads to difficulty in speaking from a loss of

tongue movement. IA/hich cranial nerve is affected?

A) glossopharyngeal

B) vagus

C) spinai accessory

D) hypoglossal

#7 Parkinson disease is the result of

A) inadequate production of dopamine by substantia nigra neurons.

B) inadequate production of GABA by neurons in the basal nuclei.

C) weak response of the red nuclei of the mesencephalon.

D) decreased levels of acetylcholine from neurons in the substantia nigra.

E) hyperactivity of the limbic system.

#8 Based on the motor homunculus, which of the followingbody regions has the largest motor units?

A) larynx B) hands C) tongue D) face E) back

#9 If the corpus callosum is surgically cu!

A) conscious decisions are made without regard to sensations from the left side.

B) objects toudred by the left hand can be recognized but not verbally identified.

C) symptoms of the "disconnection syndrome" appear.

D) the two cerebral hemispheres operate independently.

E) all of the above

#10 The flexor reflex

A) moves a limb away from a painful stimulus.

B) is an example of a monosynaptic reflex.

C) prevents a musde from generating damaging tension.

D) usually depends on cranial neurons.

E) prevents a muscle from overstretching.

#11 The subdural space lies between

A) the dura mater and the arachnoid mater.

B) the arachnoid mater and the pia mater.

C) the endosteum and the periosteum.

D) the pia mater and the dura mater.

E) the pia mater and the subarachnoid space.

#12 _____ is a condition resulting from an inflammation of a facial nerve.

A) Cerebral palsy

B) Addison disease

C) Bell palsy

D) any of the

#12 Clusters of RER and free ribosomes in neurons are called

A) microglia.

B) neurofilaments.

C) neurofibrils.

D) Nisslbodies.

E) perikaryon.

BM 1041:03 Lecture Notes - Lecture 8: Dural Venous Sinuses, Tentorium Cerebelli, Falx Cerebri

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