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Human Anatomy > Torso - Spinal cord > Flashcards

Torso - Spinal cord Flashcards

1
Q

Gross anatomy

Conus medullaris

A

thin, conical spinal cord below lumbar enlargement

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2
Q

Gross anatomy

Cauda equina

A

Nerve roots extending below conus medullaris, they exit through the intervertebral foramen as spinal nerves

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3
Q

Gross anatomy

Filum terminale

A

Thin thread of fibrous connective tissue at end of conus medullaris and connects to the coccyx

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4
Q

Where does the spinal cord end?

A

Ends between vertebrae L1 and L2

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5
Q

Spinal nerves proximal branches

Anterior (Ventral) root

A
  • Contains axons of motor neurons
  • All signals leaving the spinal cord leave through the ventral root
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6
Q

Spinal nerves proximal branches

Posterior (Dorsal) root

A
  • Contains axons of sensory neurons
  • All signals going to the psinal cord go through the posterior or dorsal root
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7
Q

Spinal nerves proximal branches

Posterior (Dorsal) root ganglia

A
  • A ganglia is a swelling of a nerve that contain nerve cell bodies
  • The nerve cell bodies of the sensory neurons of the skin are located in the dorsal root ganglia
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8
Q

Spinal nerve proximal branches

Spinal nerve

A
  • Where the anterior and posterior roots meet
  • Exits through the intervertebral foramen
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9
Q

Cross-sectional anatomy of the spinal cord

Central canal

A

Filled with cerebral spinal fluid

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10
Q

Cross-sectional anatomy of the spinal cord

Posterior median sulcus

A

depression/groove on the posterior side of the spinal cord

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11
Q

Cross-sectional anatomy of the spinal cord

Anterior median fissure

A

Deep groove on the anterior side of the spinal cord

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12
Q

Cross-sectional anatomy of the grey anatomy of the spinal cord

Grey commissure

“Body of butterfly”

A

Surrounds central canal of spinal cord and allows for contralateral communication

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13
Q

Cross-sectional anatomy of grey matter of spinal cord

Posterior (dorsal) gray horns

A

Contain somatic and visceral sensory nuclei

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14
Q

Cross-sectional anatomy grey matter of spinal cord

Anterior (ventral) gray horns

A

Contain somatic motor nuclei

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15
Q

Cross-sectional anatomy grey matter of spinal cord

Lateral gray horns

A

Contain visceral motor nuclei
Thoracic and lumbar segments

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16
Q

Cross-sectional anatomy grey matter of spinal cord

Sensory nuclei

A
  • Dorsal (posterior) grey horn
  • Visceral and somatic
  • Receive and relay signals from sensory neurons from peripheral receptors
17
Q

Cross-sectional anatomy grey matter of spinal cord

Motor nuclei

A
  • Somatic motor-ventral (anterior) grey horn
  • Innervate skeletal muscles
  • Visceral motor- lateral horn
  • Innervates smooth muscle and glands
18
Q

Cross-sectional anatomy white matter of spinal cord

White matter

A

Is superficial and contains myelinated and unmyelinated axons

18
Q
A
19
Q

Cross-sectional anatomy white matter of spinal cord

Posterior white columns

A

Lie between posterior gray horns and posterior median sulcus

20
Q

Cross-sectional white anatomy white matter of spinal cord

Anterior white columns

A

Lie between anterior gray horns and anterior median fissure

21
Q

Cross-sectional anatomy white matter of spinal cord

Lateral white columns

A

Located on each side of spinal cord between anterior and posterior columns

22
Q

Cross-sectional anatomy white matter of spinal cord

Fasciculus gracilis

Posterior white column

A

Closest to the median sulcus
Transmits touch, pressure sensations from lower body to cerebrum

23
Q

Cross-sectional anatomy white matter of spinal cord

Fasciculus cuneatus

Posterior white column

A

Lateral to the gasciculus gracilis
Transmits touch, pressure sensations from upper body to cerebrum

24
Q

Cross-sectional anatomy of white matter of spinal cord

Spinothalmic tract

Anterior white column

A

Transmits pain, temperature impulses to the thalamus

25
Q

Cross-sectional anatomy white matter of spinal cord

Spinocerebellar tract

Lateral white column

A

Transmits proprioception sensations (the sense of the relative position fof parts of the body) to the cerebellum

Human Anatomy (20 decks)

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